Find (fog)(2)

Question

f(x)=Squareroot 4-x; g(x)=1-3x^2

Find (gof)(-2) for the same problem.

Answer 1

(fog)2 = f(f(2))
g(2) = 1 - 12 = -11
f(g(2) = f(-11) = √(4 -(-11)) = √15

do the second one in the same way