Question

Is (x +1) a factor of
f(x) = x^3 + 2x^2 −5x − 6?

Yes
No

Answer 1

Yes

Explanation:

If x + 1 is a factor

x = -1 should be a root

Check for the remainder:

(-1)³ + 2(-1)² −5(-1) − 6

0

Therefore it's a root, hence x+1 is a factor