# Binomial Expansion

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#1
I don't know what to do. I have to answer 36 questions but I am getting all of them wrong.

I checked YouTube and that's useless because my teacher taught us something completely different.

Could someone do an example for me?
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4 weeks ago
#2
Sorry it looks really weird and confusing typed out but here's this
e.g (2+2x)^7 ===> (7C0)2^7(2x)^0 + (7C1)(2)^6(2x)^1 + (7C2)(2)^5(2x)^2 ...
=128+ 896x + 2688x^2...
Sorry it has some extra ones you don't need to necessarily include but it might help you see the pattern
As per the Pascal's square you'll need to multiply each term by whatever it is for 7. But on your calculator you can just use 7C0, 7C1, 7C2 etc for each term
Then as you can see the power of the 2 decreases every term and the power of 2x increases every term
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#3
(Original post by lilo16)
Sorry it looks really weird and confusing typed out but here's this
e.g (2+2x)^7 ===> (7C0)2^7(2x)^0 + (7C1)(2)^6(2x)^1 + (7C2)(2)^5(2x)^2 ...
=128+ 896x + 2688x^2...
Sorry it has some extra ones you don't need to necessarily include but it might help you see the pattern
As per the Pascal's square you'll need to multiply each term by whatever it is for 7. But on your calculator you can just use 7C0, 7C1, 7C2 etc for each term
Then as you can see the power of the 2 decreases every term and the power of 2x increases every term
Thank you so much!! I think I sort of understand a bit better now!! x
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