How do you factor #2x^2-x-3#?
Combine the factors of 2 and 3 so by subtracting you get 1.
The middle term is
Write the factors and find the cross-products:
We have the correct factors, now sort out the signs:
We need to end up with -1. (more negatives)
The top row is the first bracket and the bottom row is the second bracket.