# How do you find the zeroes for #f(x)=2x^4-2x^2-40#?

##### 1 Answer

May 29, 2015

Simplify by replacing

solve as a standard quadratic for expressions in terms of

replace

If

is equivalent to

For zeros either

Case 1:

or

Case 2:

Case 1:

There are no Real solutions, but there are Complex solutions

Case 2: