Question

The polynomial x^+3x - 1 is a factor of x^3+2x^2-5x-6​

Answer 1

If its x^2 + 3x - 1 it is not a factor.

Explanation:

x^2+3x - 1 is a factor of x^3+2x^2-5x-6​?

Try dividing:

x^2+3x - 1 ) x^3 + 2x^2 - 5x - 6​( x - 1

x^3 + 3x^2 - x

- x^2 -4x - 6

-x^2 - 3x + 1

- x - 7 <------- remainder.