3st+2su-4sv factorised

The first step to factorising this expression, is finding what is common in each term.

The GCF of 3, 2 and - 4 is 1 therefore we will not have a coefficient of the outside terms.

Then we have st, su and sv

s is common in all of them therefore we can take out s.

So far we have s ()

Now for each term we must find what we multiply by s to reach it.

3st / s = 3t

2su / s = 2u

-4sv / s = - 4v

Now just put these values inside the brackets.

s (3t + 2u - 4v)