diketahui p(x)=x4+ax3-3x2+bx-8.jika nilai p(3)=-20 nilai ab adalah..

p(3) = -20
81 + 27a - 27 + 3b - 8 = -20
27a + 3b = -20 - 81 + 27 + 8
27a + 3b = -66
9a + b = -22
b = -22 -9a

ab = a(-22 -9a) = -9a^2 - 22a

Maaf jika salah