Question

Complete this table of values for y=2x^2-4x-1

x = -2, -1, 0, 1, 2, 3,
y = 5 -1 -1

Answer 1

You just plug in the x values in the equation.
y=2(-2)^2-4(2)-1 = 8-8-1=-1
y=2(1)^2-4(1)-1 = 2-4-1 = -3
y=2(3)^2-4(3)-1 = 18-12-1 = 5

So, (-2,-1) (1,-3) (3,5)