# What is the vertex of # y= -x^2 + 12x + 36#?

##### 1 Answer

Mar 28, 2016

#### Explanation:

#y = -(x-6)^2 + 72#

graph{-(x-6)^2 + 72 [-20, 20, -80, 80]}

The vertex is the topmost point of the parabola.

Maximum occurs when

The vertex is