Question

Using the remainder theorem, which is not a factor of
`x^4-3x^3-17x^2+39x-20?`

A. x-1
B. x+4
C. x-5
D. x+1

Answer 1

D.

`x + 1`

Explanation:

`x^4-3x^3-17x^2+39x-20 = \\ = (x - 5) {(x - 1)}^(2) (x + 4)`