# How do you simplify #(x+3)(x-3)+(x+7)(x-3) #?

##### 1 Answer

Aug 28, 2016

#### Answer:

#### Explanation:

One method would be to multiply the brackets out and collect the like terms together.

This seems a long and tedious method - we will end up with 8 terms which need to be simplified.

We can also use a factoring method because there is a common bracket in each term.

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