Question

2x2-2x+8,para x=-2 qual é a conta?

Answer 1

 
2x2 -2 (-2) +8 =>
4 +4+8 => 16

Answer 2

$\ \ \ 2x^2-2x+8\\ =2\cdot(-2)^2-2\cdot(-2)+8\\ =2\cdot4+4+8\\ =8+4+8 \\=20$