Question

If x= -2 what is the value of [x+x^2+x^3] - [x+2x+3x]?

Answer 1

[-2+(-2)^2+(-2)^3]-[-2+2(-2)+3(-2)

+Step-by-step explanation:

[-2+4-8]-[-2-4-6]

[-10+4]-[-12]

-6+12=6

Answer 2

The answer is -14.
You can also use a calculator to solve this, substitution is also good.