Answer:
9-6r
Step-by-step explanation:
Distribute the 9 into the parenthesis:
9(1-r)=9-9r
Add the 3r and combine like terms:
9-9r+3r=9-6r
it is 4xy-4y^2+16x-16y
My method is to "square them"
2x. -2y.
2y
8
2x * 2y
2x * 8
-2y*2y
-2y * 8
and add all the products together
=16m3+20n2
if u simplify
