3x^2 - 13x - 10 please help me simplifying this quadratic equation. Thanks.?

This is not an equation.
An equation requires an = sign.

I will tell you, but I want you to try and think of the reasoning behind this answer. Unless you are directly using the quadratic formula to determine the possible values of 'x', you will have to develop a feeling for how these questions work.
(3x+2)(x-5)