Factorise both the numerator and denominator.
Numerator:
That can be factorised to:
Denominator:
That can be factorised to:
Now we have a fraction that looks like this:
Now have a think of what you do next....
You're probably expected to do a polynomial long division to get the result here: simplify (2x^2 - x - 3)/(x - 1) - Wolfram|Alpha
Your textbook and class notes should have examples ....?