if g(x)= 5-x^2 what's g(g(x))
g(x) = 5 - x^2g(g(x)) = 5 - (5 - x^2)^2g(g(x)) = 5 - (5 - x^2)(5 - x^2)g(g(x))= 5 - (25 - 10x^2 + x^4)g(g(x))= -x^4 + 10x^2 - 20
