Simplifying radicals | Exponents, radicals, and scientific notation | Pre-Algebra | Khan Academy
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- เผยแพร่เมื่อ 22 ส.ค. 2024
- Using exponent rules to simplify radicals or square roots
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You see this is what I hate. I try to prepare by watching these videos, and it is easy when I watch the video. Although, once it's time for a test I get tested on the same concept, but with much more complex questions. Sucks -.-. Am I the only one?
Your not the only one
Yup not the only one
if your school asks just simlying radicals you should consider yourself lucky
also this video seems to sepcifically do easy problems
You aren't the only one mate but you cannot blame anyone on not being able to do the math problems in exams these videos show you the concept of how to do the problems so if you get the concept then you can do any sum.
I swear teachers make things seem as hard as they can
I know right
Ikr, I asked my teacher why it seems like the way the teach seems more complex but he mentioned how in math we're suppose to become problem solvers ourselves and figure out problems on our own
Cole Allan its called being a lazy teacher
@@mgtowphilippines8164 hahaha so true
Your teachers are actually teaching?
anyone else having extreme difficulties understanding this topic in general?
ImSoUncreative yesss
ya me
ImSoUncreative me lol
I too am a member of the numerically challenged. Don't feel bad.
No i understand it all well mostly all
you made more sense in 10 minutes than my math teacher did in 2 hours. Thanks Sal!
ture
Ah, 240p we meet again
10 years ago for my time.
Leon Hughes well I checked it out and subbed
Princesslaila flower Now 12 years ago
13 years ago now, living for this pixelation
14 years ago now :)
I don't know why I keep forgetting this, it seems so easy...
same here
fr
Did you learn it now
I can't wait to do this type of problem solving in every day life.
GreenBlueClouds lmao do u use it now😂
It's been 6 years, are you a master now 😭
@@mimilemus5699 I've picked up a trade that only ever involved division and multiplication and I'm doing alright.
@@kadenrodrigues3745 never
@@GreenBlueClouds Oml im glad youre doing alrightt!! This gives me hope for my future
Khan graduated from MIT no wonder he's so brilliantly awesome and smart. Thank you for sharing your vast knowledge with us!
WHERE MY ONLINE SCHOOL STUDENTS AT?
Why can't my teacher explain it this way??
I Hope you graduated
If I payed attention to this video, I probably could of learned something! Thanks Sal!
This is sooo much easier than the way my teacher taught me it.
THANK YOU SO MUCH! I was literally failing algebra and you saved me. I wish there was some way to show my appreciation for that. I have cried my eyes out so many times because of not understanding algebra AT ALL.
This is such a great thing that you are doing for us and you deserve so much in return.Thank you!
if you were failing algebra 10 years ago, where r u know?
@@reflacius7377 probably has a job and children at this point lmao
If only teachers explained it like this.
i like how i go through hours of lecture and hours at home trying to figure all this radical stuff and this 9min video taught me everything i need to know. you make it so much easier man
Watched the whole video and I’m still having trouble. Yay.
OMG I WAS FREAKING FAILING ALGEBRA BECAUSE I DIDN'T UNDERSTAND THIS...AND NOW I DO!! THANKS SO MUCH!!
You saved me God bless you after missing one whole week of school I got it!!!
Hope you're doing well in school. Good luck!
my math grades are going downhill and you're helping me bring it up :'))
I had trouble for years in math but this one video helped more then any teacher did. Speaking of teachers i wonder if this guy is one because he would be a good one.
really easy and awesome explanation, needed this vid bc i was half asleep in class.. plus it was just confusing .. you've made it simple and clear!! plus your voice is cool..thanks a ton
Watching 240p on a 4K monitor - Genius
Omgg I got it !!! Thank you ! I wish I saw this earlier though I literally just stared at my Math review sheet for 30 min trying to figure out on how to simplify radicals! Watch the video only took me 5 Milton figured out .
Way easier to understand this way. My teacher keeps trying to teach it by using factor trees omg
The internet is awesome for having things like this available.
Another midnight homework session saved thanks to TH-cam lol. Straightforward and simple, the way math should be.
@Anna Lester
I know this is a month late, but for the benefit of any other people wondering the same thing...
(at around 8:14)
7(√16x20)
=7x4(√20)
=28√20
All he did was skip the step where he took 16 out of the sqr root, probably because he thought most people would realize that.
I got a math quiz tomorrow on this shit, I'm confident I will not fuck it up as much
How did u do?
he hasnt responded probably because he died since he probably failed
RIP The Grock Says
Thanks you taught in less than ten minutes what my math teacher couldn't teach in two weeks.
I don't know what I'd do without these videos.
As an 8th grader in honors geometry, THANK GOD for KhanAcademy!! I would be failing right now if I didn't know about these videos.
wow seeing that this comment was over 10 years ago you must be graduated? crazy how im in the same situation right now!
@@ilovemothers321 what a throwback omg… now 5 years out of highschool, and i remember passing geometry w a 96- you’re in the right place!
I wasn't even born when this video was posted and now I have to use it to pass math honors :') thx man
Hope you pass :3
Are we gonna ignore the fact that this same guy has been teaching us better than our teacers for over 10 years??
Khan Academy has essentially replaced my Math class. I can talk/do other homework in Algebra II and get A's on all the tests. Man, Mr. Khan needs some type of higher recognition. I don't think people realize how much this guy is contributing. THANK YOU KHAN ACADEMY
1:00
Fart?
HEARD THAT HAHAHAHAHAHA
hhhhhh you are so smart to observe this :D
Thx this was more helpful then my teacher
Khan Academy. Saving students since 2006
Thank you so much, i was failing math because i had no idea what to do, I think you just dug me out of a hole.
And I found learning maths is fun when I didn't understand what's the teacher is teaching but got to understand it better when watching in TH-cam. 😅
Khan Academy: Making math easier
Khan... I'm tutoring someone in radicals right now and the easiest way for me to explain perfect squares was to show her that if you completely factor a number, any factor that repeats will create a perfect square, and the product of all of the repeated factors is the largest perfect square in the number. A simple trick, but effective.
God bless you!!!!!🙏🏼🙏🏼🙏🏼
can't believe we weren't born when this was made
Thank you so much! You explained perfectly the part of simplifying the square roots I just flat out didn't understand...I've been looking all over the internet to find an easy to understand explanation....thank you so much!
This guy taught me better than my teacher
Thank you. You have helped me on my math homework and it's easy learning from this video!
DUDe... Thank you very much, i was struggling on this math h/w, my teacher just said use the examples.... those things don't work.. thank you man, very much.
I sat through my math class which lasted a good hour and a half feeling so confused and lost. But you just explained the exact same concept in ten minutes and I’m doing much better with my homework... thanks!
who else is just going through the comments and not even paying attention to the video
FLVS has horrible pacing and taught this like a labyrinth... Thanks for teaching it in an understandable way!!
although this video was uploaded 15 years ago this helped so much
The reason he's good at teaching is because he explains the rules and terminology as he writes them down unlike professors who have to teach what they can in an hour or 2 hours.
quarantine was so helpful because my teachers send me videos of people who actually know how to teach
Very thankful, good to hear people take time out of their lives just to do things that most people woudlnt. Thanks for the help
Reminds me of university days; God bless this guy
I had bad teachers in high school and didn't really help much but this, thank you so much for this.
Im homeschooled and found this more helpful than the videos they have me watch
completely confused
Sal clutches up once again!
Great sense of humor and very clear explanation. Thanks a lot!
i love your voice and the way you explain things your better than every math teacher ive ever had...lots of love -Mike
Omg, u just saved my life on accelarated math. I have this math packet. School and summer dont mix very well, so I forgot almost everything, Thank You SOOOO Much!!!
Excellent lesson, thank you for the comprehensive and clear instruction!
...a thankfull student.
yes I'm a junior in highschool... yes I'm taking algebra II... yes I came back here because dude I forgot how to do this and this video is very helpful.
I have Keystones Monday, and my ass of a teacher taught radicals to us in the last 2 minutes of class. Thank you for increasing my chances of passing :)
Wow. Explained way better than my teacher. Had problems with simplifying radicals until right now. Thanks 👍
I finally understand now thanks for your video. if only my proffesors explained it like this without assuming we already know it.
omg...why couldn't my math teacher have just explained it like this!?
Thank you So much sir! God Bless you! This will really come in handy for my final!
Thanks to Khan Academy I don't mind forgetting my notes anymore.
Wow I'm impressed 45 mins of class and I learned nothing. Ten mins of a video I learned everything! So thank you so much!
Your voice is calming and makes getting frustrated with math pointless.
Thanks a TON!
My teacher teaches in a way that i can't understand the best so these videos helped me a lot.
You are amazing! Going out of your way to help students you don't even know.... Thanks you!
Khan, I am so glad I found your channel. I struggle with math constantly but with your videos I understand it perfectly! Your methods are 100x easier than my teacher's. :P
Wow, this video's almost 10 years old, from TH-cam's early years b4 google...
Excellent!! You explain everything so well....thank you for all the examples. I was a pro by the end of your video :) THANK YOU!!
14 years ago .İt is an interesting fact.
I understand it for the most part, but where did you get the 28?
This is very helpful, but im in 8th grade and we do more complicated radicals.
can you please make more videos on how to simplify more complex radicals
i was watching your lessons because i wasn't paying attention in math class but i was getting distracted by you other tutorials and what not
was too lazy to pull out my notes from previous year so thanks for the quick refresher
This video was made before I was born and it helped alot danke
This really simplified things for me, thanks. Now I love simplifying radicals!!!
For solving √(50), not knowing that 25 was a perfect square, if you broke it down to √(5) * √(10), you could break the √(10) down further to √(5) * √(2) to get the same answer. Basically, it turns into:
√(50)
√(5) * √(10)
√(5) * √(5) * √(2)
5√(2) is still the answer.
What I'm trying to say, if you don't know the perfect squares, there's no need to panic. You can still simplify by breaking down further.
I'm not sure if this pattern stands throughout all of the perfect squares, but I've noticed that starting from 0 if you add the next odd integer, you get a perfect square. E.G 0+1 = 1. 1 is a perfect square. (1+3 = 4).( 4+5 = 9) (9+7 = 16) (16+9 =25) (25 + 11 = 36) and so on. Hopefully this made sense, to whoever reads this, but It's very helpful to me, and unfortunately it's something my algebra teacher never taught.
Thank you so much, my math teacher started teaching this during a test and I was the only one who was not finished.
please do harder problems! I watch these videos thinking I grasp the concept and then during exams, these questions appear new to me!
thank you so much for this!
I have a test on this tomorrow and i'm now starting to understand it. thanks!
Here's my only issue with this way of teaching simplifying radicals.. This works for students who already have a good number sense and can just "see" perfect squares.
I teach my students to use a number tree and prime factorize. Once they do that, I tell them to take the pairs out of the square root and multiply whatever can come out. Sure, my higher students see the perfect square idea, but that way works better for all students across the board.
sqrt(20)=sqrt(2*2*5). Since there are a pair of 2s, they come out of my sqrt bus and become 2sqrt(5). It doesn't fail. Also works well when you get to cube roots because it becomes groups of 3 come out from under the radical.
sqrt(72)=sqrt(2*2*2*3*3)=sqrt([2*2]*2*[3*3])=2*3sqrt(2)=6*sqrt(2)
Thank God For You Sal!
these videos saved me for my SOL
Thank you so much for posting this video. It was incredibly helpful.
Sal, you're my math teacher. I just kind of show up for marks.
THIS GUY IS AMAZING. So easy to understand! :D You saved my life dude...
2 isn't a perfect square. 9 is a perfect square. Therefore, he skipped over two and went to 9 in order to get 3. If you watch his earlier videos he's really good at explaining the basics of radicals and exponents. Try checking those out..
Thank you sososososososo much this was the most helpful thing ever
This helps a lot
This is a good video really helped me out with my summer packet
wow!!!!!!!! i FINALLY GOT IT