How do you factor #2(t-s)+4(t-s)^2-(t-s)^3#?
Note that there is a common bracket in each term. Start by dividing this out.
Let (t-s) = m
However, m = (t - s)
First let's factor out one
let's expand the square
Now we get every thing out of brackets
I'm not sure you can go any further, I've played with the right bracket and put it through a factor calculator and got nothing/