diketahui fungsi f(x) = x2 + 5x - 15 dab fungsi g(x) = x + 2. fungsi komposisi (fog) (x) =

(fog) = f(g(x))
= f(x+2)
=(x+2)²+5(x+2)-15
=(x²+4x+4)+(5x+10)-15
=x²+4x+4+5x+10-15
=x²+4x+5x+4+10-15
=x²+9x-1