What is the vertex of -2x2 plus 8x-12?

Answer 1

Complete the square to find the transformation.

-2(x-2)^2-4

the y value is -4.

so the vertex is at (2,-4)

OR

Use the vertex formula:

-b/2a

a=-2

b=8

x=-8/(2)-2

x=2

Run 2 through the original equation:

y=-(2)^2+8(2)-12

y=4