# How do you factor #x^4 - x^2 - 20#?

##### 3 Answers

#### Answer:

#### Explanation:

create new variable equal to

Your equation now is

#### Answer:

=

=

#### Explanation:

=

=

=

These are factors with rational coefficients. If we are allowed to have monomials with irrational coefficients too,

If we also allow monomials with complex numbers, then factors of

#### Answer:

#### Explanation:

Expression

Note that

If, at the first glance, it may not strike that the given Exp. is a qudr. poly, of