# How do you simplify #(3+y)/(y^2-9) -( y-3)/(9-y^2)#?

##### 1 Answer

#### Explanation:

In adding and subtracting fractions, we need to have a common denominator.

The denominators are almost the same, but the signs in the second fraction are the wrong way around. We therefore need to do a 'switch-round'.

Note:

Now we have the same denominator and can add the fractions.

An alternative method would be to factorise first:

We still need to do a switch round in the second fraction.

(The signs change in only ONE bracket)

Converting to a common denominator .