jika f(×)=xkuadrat+2×-3,g(x)=xkuadrat tambah 3x-7,dan h(x)=2-x maka nilai (fogoh)(x) adalah...

fungsi komposisi

goh(x)= g {h(x)} = g(2 - x) = (2-x)² + 3(2-x) - 7
goh(x) = 4- 4x + x² + 6 - 3x - 7
goh(x)= x²- 7x + 3

fogoh(x)= f { goh}(x)= f{x²- 7x + 3}
fog0h(x)= (x² -7x + 3)²+ 2(x² - 7x + 3) -3
fogoh(x)= x⁴ -14x³+ 55x² - 42x + 9 + 2x²-14x +6 - 3
fogoh(x) = x⁴ - 14x³ +57x² - 56x + 12