Question

g (a)=2a+2 and h (a)=-2a-5. Find (g •h)(-4+a)

Answer 1

g(a)=2a+2
h(a)=-2a-5
(g*h)(-4+a)=(2(-4+a)+2)*(-2(-4+a)-5)
(g*h)(-4+a)=(-8+2a+2)(8-2a-5)
(g*h)(-4+a)=(2a-6)(-2a+3)
(g*h)(-4+a)=-4a^2+6a+12a-18
(g*h)(-4+a)=-4a^2+18a-18