Exponent rules part 2 | Exponents, radicals, and scientific notation | Pre-Algebra | Khan Academy
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- เผยแพร่เมื่อ 25 ม.ค. 2007
- 2 more exponent rules with an introduction to composite problems
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I swear I get more info in 7 minutes here than I do in an entire hour and a half math class by the daily.
Combat Dreams same
Right
Wow technology has upgraded a lot
Ikr
I'm having to relearn all of my high school math for the GRE after three years of no math and these Khan Academy videos are the bomb.
Exactly what I'm doing right now. Forgot math for not doing it for 2 yaers. Now I have to relearn them. I'll start my Mechanical class after a week so these videos are really helpful.
I wish you were my math teacher!
How is life 9 years later ? Did it help you? Do u remember the days u were studying this ?
@@ayasavid9807 oop-
@@ayasavid9807 😎
I'm thanking God that Khan Academy exists!
Lol his voice is so soothing if literally any other person had explained this I would probably had punched something because this math is so hard XD
this is so handy. help me get my SAT scores up! thank you
You are soooooo helpful! Thank you so much!
finally i can pass my math test. thanks
جراك الله خيرا واعزك الله واحبك الله وهداك الى صراطه واعطاك ذرية صالحة
I can thank getting a 90 in math to this guy.
yes he really is a very generous person. If you watch the video of his TED talk, he says it all started with just making videos for his nephews(?) to help tutor them with math, but it grew from there :) Most of my school years were in the 1980s, well before the vast Internet we have today, and certainly long before TH-cam. But I only just discovered Kahn this year and he's been helpful both in my math and art history courses that I've been taking towards a degree in Graphic design.
I can see how you feel there, my Dad's school years were in the 1990s, he luckily had access to a computer, but those were probably limited back then.
200,000 people gave up on video 1 lol.
And 3 years later it's 600k
Project_Nova and a month later almost 700k, just goes to show how rapidly the use of the internet is expanding these days.
And year later it’s only 764K view
i always use khan academy for my studies honestly so useful!
that really helped me
I just skipped my math class and went here instead.
Did you get good grades that year 😎
@@harshjain6269 man
AWESOME!! I wish I found this years ago...
THANKS FOR CREATING THESE VIDEOS!!!
Hey there? How're you? Hope you're not dead :(
Thank you! When that last equation came up i paused the video and worked it out. Based on what you showed before, i used a different method and came up with the same answer. I despise math generally so that was great, normally i'd have to do it the long way.
Thank you! You helped out so much! ✨
thank you so much ive been struugling in this till you helped
dislikes are the teachers who can't live up lol
thanks SAL. i was really confused. but then you cleared my doutbts just in 7 minutes and 43 sec
Such a soothing voice!
Ikr!!!
The whole khanacademy thing is just too beautiful to be true. We are all about to wake up from this dream. Thank you very much for your work!
Thank you! Another excellent video on exponents.
How is life 9 years later ? Did it help you? Do u remember the days u were studying this ?
@@MN-bj4ys yes, it helped tremendously. Although I haven't needed it since graduating.
These videos really make you realize how teachers need to teach
Most underrated comment!
that helped with my homework
got top marks
This is so helpful
If you could slow down a little and add some examples for us to try, that would be great!!
Right on man, had a frustrating time with this chapter. Much better now. Thanks. I'm trying not to hate math anymore. He he. This helps.
How's life 7 years later?
This makes learning fun because I can
How is life 8 years later ? Did it help you? Do u remember the days u were studying this ?
really helpfull. missed math class... came to him ...
This was really helpful, Thank you so much.
So helpful, missed class one day and missed all of this and my instructor was NO HELP about it 😒
I hate when people do that
Really good and easy to understand!
.....your kidding right, this guy is better than great, he has gotten me through 5th, 6th, working on 7th, and im sure he'll help through the rest.
For the composite question,
Couldn't we just work with the 3squared first?
3sqaured is the same as 9 to the 1st power. So we can just add the exponents 1 and 8 then multiply it by -2 right?
I calculated it and 9 to the -18 and 3 to the -36 equals the same thing.
So does that mean both methods are acceptable?
u took time of urs to create this beautiful lesson and the very least i can do is take a sec to say THANKS!
my teacher wouldve taken 2 classes to explain what you explained in 7 minutes
Very helpful and nicely explained.
Thx this really helped but I still don’t understand why they teach us this, it’s a pain lol
?
Thank you man you are helping me study for the asvab because I forgot most of my math when I was in highschool
You are amazing 👏🏼
Thanks SAL, Very clear explanation!
great video thanks for your contribution
This is pretty easy.
God bless you my friend, I know there is a special place in heaven for you, and people like you.
How is life 9 years later ? Did it help you? Do u remember the days u were studying this ?
@@ayasavid9807 what if he lost his youtube account/made a new one and didnt see this oof
Very useful for revising maths
thanks a lot Mr. Khan!
"When you haven't done it for a couple years"
Yep, my problem with a lot of math right now. Brushing up on all of it because it's been too long and I need to know it all for a test.
Loved this lesson
thank you!!!
Wow excellent....
His voice is very soothing
this is really great because im in 5th grade and I have the math MAP test today. I have a score of a 244.
keep it up Mr. Khan
Thank you so much for this lesson! It's amazing to be able to find this here. I really appreciate this video and cannot thank you enough, take care.
The fact that you were helped by khan academy 14 years ago and you are probably old enough to be married and have children by now while khan academy it still helping others such as myself.
@@zayan1232 he may not even be alive that’s crazy to think but the odds are around 15% that he is
I believe we are all wrong, (except the professor)we are suppose to distribute the exponent into each base in the parentheses, third power of 2 is 8, of 7 is 343, so simplified it would be 8 times 343 equals 2744. I think i made the mistake of not understanding the distributive property, thank you sal for the vids, you are making the world a better place.
amazing session
i would love to go to a school with teachers like this guy T_T
this is way better than my crappy math teacher never helping me
thankyouuusoomuchhh this really helps me alot😩
Thank you! So easy to understand when you explain!
P.S. Love your voice! ))
not easy
GREAT JOB ,
This helped me too! thanks Khan!
How is life 8 years later ? Did it help you? Do u remember the days u were studying this ?
OMG thank you so much... But Can you do a bit difficult questions
could have been better if you also did the operation to the bases
God bless you Sal!!!!!!!!!
How is life 9 years later ? Did it help you? Do u remember the days u were studying this ?
i'm home schooled too # ihateschool
Fell asleep during the from his voice also because it was already 11:00 where I am but ur voice is the thing that put me to sleep haha wow...good morning
...
i have to agree....
Where are these questions mentioned at the end of the video?
danks w3 r lernin dis n me 3rd gwade claze helpsd alotts
Phillip Lee Lol LMAO it was a joke xD
Lol😍😆😄😊
Thanks
What about (4) to the power of 2
That would be 4 times itself(4x4)that would also be 4 squared
adam ya geldi adam
2018?
great
When u times it by itself though wouldn't it b for ex. 3^2x3^2 wouldn't it equal 9^4
@kerolification in terms of funding i think khan is fine as he receives funding from various sources already. YOU however can repay him by acing your classes
KHAAAAAAAAAAANNN!!
WWWWWHHHHHAAAAATTT??😕😕😐😐😆😄😊✌
@@queensaharaice7376 😁😆😙😉🙂
@Thew26XppX How can you study well for SAT and what type of questions are there on it?
what do i do if both the indices are negative eg: 10^-4/10^-2
Thank you!!!!!!!!!!
Peridoottt!!! XD
Really helpful. But in school we are learning problems a bit more advanced like:
x^-3 y^3 . 3x^0
and
m^2 n^-3 / 2nm^3
So maybe if you could make a video on those, than that would be great.
How is life 10 years later ? Did it help you? Do u remember the days u were studying this ?
@@ayasavid9807 10 years..... wow. Hahaha
@@scraper1000 now 12 years ago :D
I’m still alive
@@scraper1000 awesome :) hope everything's going good for you scraper :)
Not everyday someone comes back to comment on their post from 12 years before. Good to see you're still active :)
i thought that if you had a negative exponent(lets say -2, it would become 1/a^2???
my dad showed me this site and i dont like it but it gave me an excuse to be on youtube when i am not supposed to so tanks sal
You can rewrite it as 1/3^36, and that will make it positive.
I have a question: Can't you just rewrite the last one as 27^-20, instead of 3^-36; are they not the same?
2 times 7 is in parentheses, it seems that the answer should have been 14 to the 3rd power if you were to solve the parentheses first and the exponents second.I may be wrong because im new to this. But if you have a explanation for my confusion it would be greatly appreciated.
this helped so much thank you. also bro this came out before i was born 💀
6 to the third power times 2
how would i solve (-5)(-5)^4?
Fr
i like ya cut g
Bro I wasn’t even born when this came out
SAME :)
10^-6
Are there separate videos with exercises or something? thanks
How is life 10 years later ? Did it help you? Do u remember the days u were studying this ?
@ktrel54 I'm just gona throw it out there that i knew you would be an aussie after i saw "mate" :P
tho i fully agree that hes a genius and helps a lot of people
id like to know what his recording software is too... babe nvidia?
3^2 = 9^1 is how I did it...same result.
WHAT IF THE coefficient is different? pls anser
Why is he going to answer 15 years later? 😂
@@-MissSiri- because i know someone else who sees this comment might help me..?
Where are the problems he mentions near the end of the video?