Answer:
Step-by-step explanation:
x - y = -8
-y = -x -8
y = x + 8
12 x^4 y^4
4x(3x^3y^4)
Distribute
4 (3) *x*x^3 y^4)
Remember a^b* a^c = a^(b+c)
12 x^(1+3) y^4
D