Question

How do you use Binomial Theorem or Pascal's Triangle to expand `(2x-y)^5`?

Answer 1

`32x^5 - 80x^4y + 80x^3y^2 - 40x^2y^3 + 10xy^4 -y^5`

Explanation:

1
1,1
1,2,1
1,3,3,1
1,4,6,4,1
1,5,10,10,5,1

`(2x - y)^5 = 1(2x)^5 + 5(2x)^4(-y) + 10(2x)^3(-y)^2 + 10(2x)^2(-y)^3 + 5(2x)(-y)^4 + 1(-y)^5`