Want to PASS Algebra 2? You better understand this…..
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- เผยแพร่เมื่อ 28 ก.ย. 2024
- TabletClass Math:
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Math help with multiplying complex numbers an important Algebra 2 topic. For more math help to include math lessons, practice problems and math tutorials check out my full math help program at tcmathacademy....
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I dropped my Alg 2 class within the first 2 weeks of class, I wish these types of resources existed to me back then 😭
You should join back.
It was really helpful. I need to review my math. I have done math to calculus 2 at UNI for a Chemistry degree more than 50 years ago. Now, I have my grandkids doing Maths from Grade 8 to Grade 10 and I have realised that I have forgotten many things. I have decided to review ALL the maths from Algebra 2. I will certainly, follow your courses. I enterily agree about "notetaking". In my time we did not have calculators, but we use "log tables" and "slide rule". Eventually, in the 1970 I was able for buy my first calculator. The rest is history! Ah, my old Maths teacher use to say: "You just need paper and pencil to practice and learn Maths".
Much the same. However attending school in Switzerland we had to memorize the logs from 1 to 10 and all the angles of a circle in 15 degree increments. That discipline has saved me several times and I often do not need a calculator to solve complex (both definitions) problems.
Thankyou this helped me out alot because I have never been good at math and maybe just watching this video helped me understand it more
Thank you this was really helpful
I just wanna say I’m cooked
At least I was able to apply the FOIL method but it got tricky when I had to deal with the imaginary part.
Now I know!
Thank you!
Why do you do i^2 = -1?
I have college M 200 and I really need to pass. I will keep watching your videos
In (3 + 5i) you're adding areal number to an imaginary number. Isn't this giving a new meaning to (+) and the same to (-)?
Video starts at 3:43.
cool
I'm in middle school and I got the right answer!
Better review now. Thanks
Content was good, when it came. Shame about the 90% waffle.
6-2i-20isquared
That’s w
1000% is that 10 times better than 100%?
yapper
i dont like math im home schooled and have to wach theese
Why you need complex numbers? There are many engineering problems that are more easily solved in the imaginary world.
I never took notes, and I was always at the top of my class in math. Notes aren’t important, understanding the concepts that you are taking notes about is important. If you learn the principles, you won’t need notes!
Hmm
Flex much nerd
I used to think that too, but for me, writing things down in my own words and attempting problems before the teacher did was very useful and help me understand things much better.
Yeah this ngga definitely unlocked ki powers
Not everyone is the same, bud. Congrats on being good at math, but it is not very helpful.
God damnit I got a D in algebra 2 💀
this was a really good starting video thank you so much
If a student plans on going into electronics they need to get quite comfortable with imaginary numbers. Especially when doing calculation on circuits involving capacitors & chokes. Also they'll have to get used to converting back and forth between Polar Form and Rectangular Form because easier to multiply or divide in Polar Form and add or subtract in Rectangular Form.
This comment is straight legit on point
summary of the video and timestamp of what is important and what you should
Starting a video to 3:43 seconds
How to improve become a better student
3:46-8:59
explains the importance of complex numbers in real numbers and you need to remember
8:59-14:47
Proceeds go to have no problem explaining step-by-step on how to solve, then begins to explain the importance of knowing complicated numbers and my notes are very important
Hi! Will you be kind to tell me where I can look for your videos to understand that 120i squared is actually -20 x -1. I can understand I = suareroot of -1 is isuared = -1. But I still cannot understand that 120i squared is -20 x -1. Thank you so much.
Absolute nonsense
Yeah -- most modern calculators can do complex numbers directly (any HP48.49, 50 Prime) -- generally the best way to deal with this is convert to polar - multiply the magnitudes and add the angles, then convert back. You can aslo do it the hard way with using j^2 = -1 and use foil. Also not that me main field that uses complex numbers is electronics/electrical engineering - in that system we use j as the imaginary operator instead of the "i" because "i" is already used as current.
This really isn't beneficial in any way for anybody studying Algebra 2, or even Algebra 1! Anybody who knows that "i" is can solve this problem easily, and that doesn't prove anything remotely related to passing Algebra 2, a much more demanding course than the square root of negative 1 could ever be.
A Liner matrix explaining vectors I trying to link them together so I can look at an equation and brake it down easy with a mental view of its actions placed on the coordinator scale ty for you videos they help me dream thank you
I passed algebra 2 without knowing this now I'm struggling in college precalculus 😂
My daughter is doing this now in 11th grade and she has been crying because she doesn't know how to do it
Rodriguez Jeffrey Wilson George Young Anthony
Interesting how you make problems that are simple very complex and painfully tedious. It is even more interesting that you don't realize it.
That’s an interesting but complex comment. I am intrigued that something complex for many but simple for you is also tedious for you but may become simple and less tedious for many. I think people should make up their own minds. Sorry to give a complex and tedious answer and I hope it isn’t painful.
THIS IS HOW MATH WORKS
Not everyone who isn’t taking notes is on their phone or talking to someone. I can’t take good notes because I have an auditory processing disorder. I always had a friend take notes for me.
Womp womp
(3+5i)(2-4i)
6-12i+10i-20i^2
6-2i-20i^2
6-2i-(20•-1)
6-2i+20
26-2i ✓
So 20i squared = 20( -1 ) ?
How did you get this? 6-2i-(20•-1)
@@dougrigel1997 i^2 is equivalent to -1, thus the square root of -1 is equal to i. 20 times i^2 is 20 times -1, which is -20.
@@dougrigel1997That’s i squared - not 20i squared. i squared equals -1.
@@dougrigel1997 +5i x -4i = -20(i squared)
26-2i?
You will only ever need this in algebra class. I never once used imaginary numbers in 3 semesters of college calculus.
Hello sir I’m in a college and I’m really getting struggled with Algebra 2. And even i know my math is not enough.Because I’m understanding or no remembering the rules and that’s why I’m getting mad and I can’t solve the equations then can I have one of your videos that talks just about the rules of Algebra in General.I will really appreciate that thank you 🙏.
That was an "EASY" problem???? Difficult to understand...
I’m confused how he got i= the square root of -1
26 -2i
1000%, come on dude, how can the correct answer be 10 times more than the correct answer.
if an apple a day keeps the doctor away, and that is correct then 1000 apples keep the doctor away 1000 days or keeps 1000 doctors away one day. which is 1000 x better than 100 percent.
No such thing as %1000.
yes there is ,
Stuff is pointless! Nun of this Stuff is used in the real world. Teach on how to work, pay bills , & to never go broke.
Valde facilus! Id est= 26 -- 2i, Numera complexa, responsi.
02:28 nots not
05:28 should of wrote .... +/- x2=16
Good! 😃 Agreed on the a topic for Algebra 2. 😃
Alternate solution. Use an alternative to FOIL. Use a graph/matrix. This will reduce any chance for mixing up terms.
Now that method deserves the A+! 😃
You lost me here: why does I = the square root of negative one?
Agreed upon in order to accommodate those situations when you have the square root of a negative number, which is not a real number.
Thanks. I need a bit of help with the step of i = √-1. Do you have a video that explains this?
It basically means that i*i (or i^2)=-1
It's an agreement to have a way to solve negative square roots.
Example
2i*2i=-4
3i*4i=-12
4i *4i=-16
(xi)^2= x^2 -1 + 2xi
(1+i)^2 = (1+i)*(1+i)= 1-1+2i=2i
NOTE that 1+i is NOT the same as 1i (1 TIMES i)
I HOPE this made things more clear.
@@rocksparadox May be you can check your examples before publishing them: (xi)^2= x^2 -1 + 2xi. ?????
Or did you mean (x+i)^2. ? Check what you write before you publish it.
x^(2) = -16
x = sqrt (-16)
x = error
modern problems require modern solutions
Hello sir I am what I call kinda smart I’m 10 and I just finished learning the Pythagorean and the Pythagoras I finished algebra 1 now I’m on this tysm for the help
Don't you know the difference between R and {R}? You use {R} where you have to use R. Please don't give students the wrong examples.
Yapper McYappington
=6-2i-20i²
I did this in my head while you bantered for 3+ minutes… 26-2i
=6-12i+10i-20i^2, =6-2i-20i^2 but i=(-1)^0.5, =6-2i-20×(-1), =6-2i+20, =26-2i
why do you say i=(-1)^0.5? where does the ^0.5 come from?
@@robbin.bankss imaginary number, i is equal to sq(-1)
why did you talk about nothing for 13 minutes
omg i fell asleep
Hmmm
My answer before watching this video is correct and I never took algebra 2.
6-12i+10i-20i^2
6-2i-20i^2
Way, way too slow and uninteresting!
Bros professor yap Jesus christ