Answer:
Answer is 4x^3-40x^2+52x+96
Step-by-step explanation:
(x+1)(x-3)(x-8)=
(x^2-3x+x-3)(x-8)=
(x^2 -2x-3)(x-8)=
x^3-8x^2-2x^2+16x-3x+24=
x^3-10x^2+13x+24
because coeficient of x^2 is - 40, we multiply the whole equation by 4, then
4x^3-40x^2+52x+96.
