Question

Show that (x+3) is a factor of Xcube+x square - 4x+6

Answer 1

Step-by-step explanation:

Plug in -3 in the cubic equation. If you get 0, it is a factor.

-3^3 + -3^2 -4(-3) +6 = -27 +9 +12+6 = 0

x+3 is a factor of x^3 + x^2 -4x + 6