Question

I need help with theese 3

Answer 1

20.

(-4x)^2

You need to distribute the power of 2 to -4 and x

21.
([3m/2n])^3

You need to distribute the power of 3 to 3,m,2, and n.

22.
-(xy^2)^3
Distribute the 3 to x and y. When distributing a power and a power you will multiply, thus y^2 will equal y^6. Don't forget the negative outside the parenthesis.