Question

What is the vertex of `y=-3x^2 -3x +10`?

Answer 1

Vertex `(-1/2, 43/4)`

Explanation:

x-coordinate of vertex:
`x = -b/(2a) = 3/-6 = - 1/2`
y-coordinate of vertex:
`y(-1/2) = -3/4 + 3/2 + 10 = 3/4 + 10 = 43/4`
Vertex `(-1/2, 43/4)`
graph{-3x^2 - 3x + 10 [-40, 40, -20, 20]}