To factor is to apply the distribute property backwards.
The distributive property is:

To factor is:

Then, we need to find, in the two terms of the question, common factors of them.
We have:

We have an x in both terms, then we can rewrite:

Also, we can see that both term are divisible by 5. Then we can write:

And now we can factor 5:

Thus, the expression, factored is:
