Question

Evaluate the polynomial for x=2

2x^2-4x+2=2*(2)^2-4*(2)+2
=2*4-4*(2)+2
=8-4*(2)+2
=8-(8)+2
=18

Am I right or wrong?

Answer 1

You are OK up until the last step.

How can you say that 8 - 8 + 2 = 18?