x^2-3xy-10y^2-3x+y+2 因式分解
问题描述：
x^2-3xy-10y^2-3x+y+2 因式分解
答
x^2-3xy-10y^2-3x+y+2
=(x-5y)(x+2y)-3x+y+2
=(x-5y-2)(x+2y-1)