Question 399686
y=-2x^2 - 8x +3
.
Axis of symmetry:
x = -b/(2a)
x = -(-8)/(2(-2))
x = 8/(-4)
x = -2
.
plug above into:
y=-2x^2 - 8x +3
y=-2(-2)^2 - 8(-2) +3
y=-2(4) - (-16) +3
y=-8 + 16 +3
y = 11
.
vertex is at (-2, 11)