Binomial theorem: finding the coefficient of x^3 in (2-4x)^5

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MEI Core 1 May 2013

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You may have posted this 8 years ago, but it is still helping people today <3

chronicrandomness

Awesome!!! Great video, easy to follow. If you are new to this like me, I recommend pausing and working it out with this instructor then move forward with this. Perfect video! A++++

WlfReaper

I watched Mario's math tutoring and this one and they both seem to be teaching me better than even my textbook.

huzmaths

Mind-blowing teaching concept hai maths perfect sir

RANJANKUMAR-ejtb

my teacher took 40min to explain and I still didn't get it but u took only 3min. you are the best

kabezaorion

The video is really easy to understand and helpful, thank you for your explanation!

ukrainskybespilotnyk

I understand this much more now cheers. Is this a GCSE or A level topic?

Maxibgolf

My god, now I know why my niece is having such a hard time with math. I stoped taking math after calculus II in college because my major didn’t need more advanced math. It’s been years since I look at complicated math again, and now trying to help my niece with her homework and this video just gives me headaches. It’s going to be a long night!

hmwoof

Did you use "x" as a multiplication sign when there's an x in the equation? I think I got lost. I'm about to rewatch.

LoganGardner

Thank youuuuy!!! MAY GOD BLESS YOU! You are a really good helppp

ЛейлаСливки

thank you so much it was short and to the point

haifa

Fantastic! Thank you! This took my maths teacher like a whole lesson, but you did it in 3 mins :)

leeemattyrs

C2 is in my opinion where the a level difficulty really kicks in, C1 feels like GCSE (Except arithmetic series) who else agrees

ranksters

How did you get to -640, you didn't explain that part hence im lost sir

mbikookuhledlamini

Find the co-efficient of x^100 in the expansion of( 3-5x)/(1-x)^2.how to do that math?

dipdatta

Amazing video, this was super super helpful... But one thing I'm confused about is that.. adding the powers to get the overall..now for that equation, the overall power is 5, so how do we know whether we can use 3+2 or if we can use 4+1. I'm kinda stuck with that ... My question I'm doing is X^3 for (3x-4)^4 ... So is it 2+2 or 3+1?, How do I figure that out?

latanyaexe

thank you so much!! this was a perfect explanation!

axolatte

You did do that. Never use an "x" to symbolize that when you're using variables defined as "x" as well. It's very confusing.

LoganGardner

In real adult life, when do we apply this type of problem solving

MJ-eyng

so what if its something like (x-4)^9 what wold i have to do

crimson

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