# Is #f(x)=(x^2-5x-9)/(2x+1)# increasing or decreasing at #x=0#?

##### 1 Answer

Feb 15, 2018

At

#### Explanation:

We must find the differential, hence allowing us to determine the gradient, and hence weather its increasing or decreasing...

Use the question rule..

When evaluating the differential at

Hence the gradient is positive,

As we can see by the graph it may be negative at