Question

y = x2 + 6x − 16,

I need th vertex, I know that it is -3, -25 but i keep getting 43 for y.

Answer 1

-3 is the correct x coordinate, so you plug this into the given equation to get

y = x^2 + 6x - 16

y = (-3)^2 + 6(-3) - 16 ... plug in x = -3

y = 9 + 6(-3) - 16 ... note: (-3)^2 is positive 9 and NOT negative 9

y = 9 - 18 - 16

y = -25

So when x = -3, y is y = -25

This means the vertex is (-3, -25)

Answer 2

ooooooooh! ok cool thanks

Answer 3

yw