Question

Use the Binomial Theorem to expand the binomial.

(x + 2y2)3

Answer 1

given: (a+b)^n

i like to format it as such

nC0 nC1 nC2 nC3 ... nCn
a^n a^n-1 a^n-2 a^n-3 ... a^0
b^0 b^1 b^2 b^3 ... b^n

then just multiply down the columns and add the em up

Answer 2

(x + 2y2)3

1 3 3 1
x^3 x^2 x 1
1 2y2 4y4 8y8
-------------------
x^3+6x^2y^2+12xy^4+8y8

if i seen it right