1. ## binomial expansion...

hiyaa,
theres this question which i'm stuck on cause it has a 2 in front of the x and i can't work it out

(1-2x)^4

thaaank you

2. Find the binomial expansion of $(1 - a)^4$ and then everywhere you see an a, replace it with a 2x.

3. ohh sounds simple, thank you