jika fungsi f(x) =x²-5x+4 dan g(x) =2x²+x-8,nilai (f°g)(-2)=

f(x) = x² - 5x + 4
g(x) = 2x² + x - 8

g(-2) = 2(-2)² + (-2) - 8
g(-2) = 8 - 2 - 8
g(-2) = - 2

(fog)(-2) = f {g(-2)}  = f(-2)
fog(-2)= f(-2) = (-2)² -  5(-2) + 4
fog(-2) = 4 +10 + 4
(fog)(-2) = 18