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Factoring rules needed:
The difference of two squares factors like this:
The sum of two cubes factors like this:
To factor
The difference of two cubes factors like this:
To factor
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We factor by writing it as .
So it's the difference of two cubes with and
So it factors as
We factor by writing it as .
So it's the sum of two cubes with and
So it factors as
We factor by writing it as .
So it's the difference of two squares with and
So it factors as
So we replace everything by its factorization:
.
We can cancel the 's
.
And also we can cancel the 's
.
That leaves:
It's not necessary, but you can FOIL
out the numerator and get
Edwin
