# How do you find the number of complex zeros for the function #f(x)=x^4-9x^2+18#?

##### 1 Answer

Mar 8, 2018

#### Answer:

See details below

#### Explanation:

We can make the variable change

Both solutions for

Undoing the change of variable

Our initial equation has no complex roots (or zeros), but we can express them in complex form (with their imaginary parts zero)