f (x) = x^2+3 g(x)=x+4 find (fog)(-2)

Question

f (x) = x^2+3 g(x)=x+4 find (fog)(-2)

Answer 1

f(-2) = 4 + 3 = 7

g(-2) = 2

f(g(-2)) = f(2) = 7 also.  The expression the left here is another way to do COMPOSITION fog.