x^3-8y^3-x^-x^2-2xy-4y^2
问题描述：
x^3-8y^3-x^-x^2-2xy-4y^2
答
x^3-8y^3-x^-x^2-2xy-4y^2
=(x-2y)(x²+2xy+4y²)-(x²+2xy+4y²)
=(x²+2xy+4y²)(x-2y-1)
答
题目应该是x³ －8y³ －x²-2xy-4y²吧?x³ -8y³ -x^2-2xy-4y²＝（x³ －8y³ ）－（x²＋2xy+4y²）＝（x-2y)(x²＋2xy+4y²)－（x²＋2xy+4y²）...