# How do you find the vertex in #y= -2(x+3)(x-1)#?

##### 1 Answer

May 20, 2015

The vertex will have an

So the

Substitute this value of

So the vertex is at (-1, 8).

Another way of calculating this is as follows:

Differentiate this by

The derivative, which represents the slope of the curve at any point will be zero at the vertex, when

Substitute this value of