Question 156078
1. {{{x^3y-3x^2y-10xy =xy(x^2-3x-10)=xy(x-5)(x+2)}}}
2. {{{x^2-4xy+12ax-48ay=x(x-4y)+12a(x-4y)=(x+12a)(x-4y)}}} 
3. {{{x^2-5x-6=(x+1)(x-6)}}}