Question

Using the remainder theorem, which is not a factor of xFormula1" title="x^4-3x^3-17x^2+39x-20?" alt="x^4-3x^3-17x^2+39x-20?" align="absmiddle" class="latex-formula">
A. x-1
B. x+4
C. x-5
D. x+1

Answer 1

Answer:

D.

$x + 1$

Step-by-step explanation:

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