x^3-3xy-18y^2-3x-9y因式分解
问题描述:
x^3-3xy-18y^2-3x-9y因式分解
答
x^3-3xy-18y^2-3x-9y
=(x^3-3xy-18y^2)-3x-9y
=(x-6y)(x+3y)-3(x+3y)
=(x+3y)(x-6y-3)