How do you factorise -4 -12a?

Answer 1

8

Answer 2

Notice that -4 and can both have 4 divided into them and you still have a whole number.

So you can "pull out" the 4:

4( -1 - 12/4 a) = 4 ( -1 - 3a) and if you want you can grab the negative while you're at it:

-4-12a = -4 (1 + 3a) remember to change that sign inside.