Question 112732
x*y=15
x-y=2  -> x=2+y

(2+y)*y=15
y^2+2y=15
y^2+2y-15=0
(y+5)(y-3)=0
y=-5 or y=3

When y=-5:
x*-5=15 ->x=-3 
-3-(-5)=2

When y=3:
x*3=15  ->x=5
5-3=2

The two factors are 3 and 5 or -5 and -3