# How do you factor by grouping: #3x^2 + 3 + x^3 + x#?

##### 2 Answers

The factored form of the expression is

#### Explanation:

First, rearrange the terms. Then, factor

This does it:

#### Explanation:

I am not sure about the "by grouping" method, but I stumbled on a way to factor that expression.

I noticed that it could be written

From there I put the 3 and the x inside a second set of parentheses and saw that

So

A preferable way to write it would probably be

I hope this helps,

Steve