Medium
If p(x) = 5x² + (-4)x + (-3), find p(-2).
Explanation
Explanation
Substitute x = -2 into p(x): p(-2) = 5(-2)² + (-4)(-2) + (-3) = 20 + 8 + -3 = 25.
PRO TIP
Re-check your working by substituting the answer back into the original question.