Question

Is x - 8 a factor of the function f(x) = -2x3 + 17x2 - 64?

Answer 1

do u mean -2x^3+17x^2-64 ??

Answer 2

If x-8 is a factor of the function f(x), then f(x) = (x-8)(ax^2+bx+c). Then if you plug x = 8, then f(8) = 0. So, compute f(8), if it gives you 0 then x-8 is a factor of f(x).