# How do you find the number of complex zeros for the function #f(x)=5x^5+36x^3+7x#?

##### 1 Answer

Oct 5, 2016

There are four complex zeros

#### Explanation:

First of all, we can factor out an

For the remaining part, let

You can verify that this quadratic equation has solutions

Substituting back, we'd get

This means that there are four complex roots.