Question

Evaluate 6x^2+12x-18 when x=-1 (please show steps to solution)

Answer 1

All you have to do for this is substitute all the x's in the equation for -1.

6x²+12x-18

6(-1)²+12(-1)-18
6(1)+(-12)-18
6+(-12)-18
6+-30
-24

The answer is -24, I hope this helps.