# How do you factor #8x^6 + 7x^3 - 1#?

##### 2 Answers

#### Explanation:

This is in the form of a quadratic because.

Find the factors of 8 (and 1) which subtract to give 7

The signs will be different (because of -1)

There must be more positives (because of +7)

The factors of -1 can only be +1 and -1

Place the 8 and the 1 so that we will get +8 and -1. when we multiply.

Set

Reverse to x we have that

Now

and

Hence finally we get