Question 290627
y=-x^2+8x+16


y=-(x^2-8x-16)


y=-(x^2-8x-16+16-16)


y=-(x^2-8x+16-16-16)


y=-((x-4)^2-16-16)


y=-((x-4)^2-32)


y=-(x-4)^2+32



vertex is (4,32)