Medium
If p(x) = 2x² + (-1)x + (-3), find p(-2).
Explanation
Explanation
Substitute x = -2 into p(x): p(-2) = 2(-2)² + (-1)(-2) + (-3) = 8 + 2 + -3 = 7.
PRO TIP
Re-check your working by substituting the answer back into the original question.