# Question #49a01

##### 1 Answer

Given:

Please notice that the denominator is

The reason why we chose to do this is, because it make the denominator fit the pattern

Please look at what happens to the denominator:

See how the denominator fits the pattern?

Square the terms in the denominator:

Use the property

That changes the minus sign in the denominator to a plus sign:

Perform the addition:

Use the F.O.I.L method on the numerator:

Do the same thing with

Change the sign:

Combine like terms:

You can leave it like this or you can divide each term by 13: