# Question #e0668

Feb 2, 2018

See below.

#### Explanation:

Take the expression $6 x + 3$.

We don't actually factor out a coefficient. To factorise linear expressions, we must take out the Highest Common Factor of each term.

Here the HCF is 3

$\therefore 6 x + 3 = 3 \left(2 x + 1\right)$

We can expand this out to double check.