# Question #eca0b

##### 1 Answer

Do some factoring to get

#### Explanation:

First we check to make sure the ratios are the same for consecutive terms. In plain English, this means we do this:

Because the ratios are the same, we can factor by grouping.

Now, let's pull an

And a

Note that these have a common term of

That means we can pull out a

This last part may seem confusing. If it helps, replace

For me, it's easier to see that we can pull out an

Now just replace