Question #N989
If $x^2 + 2x - 3 = 0$, what is the value of $x^3 + 2x^2 - 3x$?
A. -3
B. 0
C. 3
D. 9
Correct Answer is: C
We can factor the given equation as $(x+3)(x-1)=0$. This means that $x=-3$ or $x=1$. Substituting either value into the expression $x^3 + 2x^2 - 3x$ gives us 3. Therefore, the value of $x^3 + 2x^2 - 3x$ is 3.