Question

evaluate the following x2 -x-6 at x= ​

Answer 1

x = -2 or +3

$x^{2}$-x-6=0

$x^{2}$ - 3x +2x -6 =0

x( x-3) +2(x - 3) = 0

(x+2) ( x-3) = 0

x = -2 or +3