x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8因式分解（过程）

【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) [2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2 (3x-4y)(5x-4y)-(7x-8y)(6y-5x) 3(x-y)^2-7(x-y)+8(y-x)^2+6(y-x)合并同类项. {6(x-y)-7(x+y)=21 {2(x-y)-5(x+y)=-1 计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2) -6x-y-7x+6x-2y-10x+8y+x+6x-8y的值 (2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解 已知|5x-y-8|+(7y-x+2)=0则4x+6y 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= -8(2x-y)-{7x-[6x+2y-(10x-8y)]}等于多少? 3x+5y-(x+y)=6 2(x+y)-3x=-7 因式分解：-x平方+4x-4；8（x平方-2y平方）-x（7x+y）+xy,4x三次方-4x平方y-（x-y）,x平方y-5xy平方+6y三次方 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 x+y=1 5x-2y=8 3x-y=7 2x-y=3x表示y和用y表示x 3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y 联立方程 有的话 3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y 3x+2=y 5X+4=Y 7X+6=Y 9X+8=y 11x=y要如何计算