# How do you simplify #(y ^ { 3} - 2y ^ { 2} - 3y + 4) - ( 2y ^ { 3} - y ^ { 2} + y - 3)#?

##### 1 Answer

Sep 27, 2017

#### Explanation:

So we need to collect all of the like terms, ie. all

So we need to multiply all of the terms inside the brackets by -1, so all of the negative terms become positive and positive terms become negative.

The first bracket is simply multiplied by 1 so the expanded bracket is:

Now add the other bracket:

All of the terms are now outside the bracket meaning we can add like terms: