the parabola given by the equation has it's vertex at (h,k)for

Question

the parabola given by the equation y=-x²+8x-10 has it's vertex at (h,k)for

h=

k=

this question haves 2 answer I keep getting it wrong

Answer 1

Put the equation in standard parabola form:

First, complete the square: y=x²+8x-16+16-10

So, y=(x+4)²-26

h=-4 and k=-26

Check: (-4)²+8*(-4)-10= 16-32-10= 26

Parabola opens up with vertex at (-4,-26)

Answer 2