# Is #f(x)=(x-3)(x+5)(x+2)# increasing or decreasing at #x=-3#?

##### 1 Answer

Dec 6, 2015

The function is decreasing.

#### Explanation:

The answer lies if the first derivative. If it is positive at

It's easier to compute the derivative of the expanded form, and we have that

So, the first derivative is

Evaluating

So, the function is decreasing.