Question

What is the vertex and `y`-intercept of `f(x) = -4(x+3)^2+7`?

Answer 1

(0,-29) is the y intercept
(-3,55) is the vertex, a maximum

Explanation:

`y=-4x^2-24x-36+7`

`y=-4x^2-24x-29`

`(-b)/(2a)=24/-8=-3` this is the x coordinate

`y=-4xx -3-24xx-3-29`

`y=12+72-29=55`