Question

find the vertex the line of symmetry the maximum or minimum value of the quadratic function and graph function.
f(x)=-2x^2+2x+7
I have the x-coordinate vertex is (-2,7)

Answer 1

f(x) = -2x^2 + 2x + 7
the vertex is at x = -b/2a = -2/-4 = 1/2
Huh?

Answer 2

(-2, 7) is not a solution.

Answer 3

that answer was given already.

Answer 4

You can try it for yourself
-2(4) + 2(-2) + 7 = -5