# Is #f(x)=(2x-2)(x+1)(x+4)# increasing or decreasing at #x=-1#?

##### 1 Answer

Apr 5, 2017

#### Explanation:

To test the slope of

Hence the slope of

This can be seen on the graph of

graph{(2x-2)(x+1)(x+4) [-5.665, 3.104, -1.95, 2.43]}