Question

seja f(x)=2x²-3x+1,calcule f(-2)

Answer 1

2.(-2)^2-3.(-2)+1

8+7

15

Answer 2

$f(x)=2x^2-3x+1\\\\f(-2)=2(-2)^2-3(-2)+1\\f(-2)=2\times4+6+1\\f(-2)=8+7\\f(-2)=15$