Question

Evaluate 2x^2 + 2x - 8 when x = -3 I keep getting the wrong answers

Answer 1

\[2(-3)^2+2(-3)-8\] is what you need to compute

Answer 2

step by step you get
\[2(-3)(-3)-6-8\]
\[2\times 9-6-8\]
\[18-6-8\]

Answer 3

Ohh wow that makes sense. I was being stupid and doing -3 cubed for some reason. Thank you!