2x^2−10xy+3xy−15y^2

factor by grouping

There are four terms in your algebraic expression.  Notice that the left two terms have the factors 2 and x in common, whereas the right two terms have the factors 3 and y in common:

2x(x-5y) + 3y(x-5y).  Can you now factor this further?  Note that the two terms here have a common factor, (x-5y).

The answer is budget i believe. hope this but it’s self explanatory.