jika h(x) = 5 - 4x dan p(x) = x² + 3x - 8 . tent (poh) (x)

p°h(x) =p(h(x))
=p(5-4x)
=(5-4x)²+3(5-4x)-8
=25-20x-20x+16x²+15-12x-8
=16x²-20x-20x-12x+25+15-8
=16x²-52x+32