Question

Approximate the real number solutions to the polynomial function f(x) = x3 – 2x2 – 16x + 32 .

x = –4, x = –2, x = 2

x = –2, x = 2, x = 4

x = –4, x = –2, x = 4

x = –4, x = 2, x = 4

Answer 1

x3 – 2x2 – 16x + 32=0
factor
(x-4) (x^2+2x-8)=0
(x-4) (x-2) (x+4)=0
x=4 x=2 x=-4