=(x-y)^2[(x^2-y^2)-(x-y)^2]
=(x-y)^2(x^2-y^2-x^2+2xy-y^2)
=(x-y)^2(-2y^2+2xy)
=2y(x-y)^2(x-y)
=2y(x-y)^3
=(x+y)(x-y)^3-(x-y)^4
=[(x+y)-(x-y)](x-y)^3
=2y(x-y)^3
因式分解 (x^2-y^2)(x-y)^2-(x-y)^4
(x^2-y^2)(x-y)^2-(x-y)^4 =(x-y)^2[(x^2-y^2)-(x-y)^2]=(x-y)^2(x^2-y^2-x^2+2xy-y^2)=(x-y)^2(-2y^2+2xy)=2y(x-y)^2(x-y)=2y(x-y)^3
初二的因式分解题:(x^2-y^2)(x+y)^2-(x-y)^4
=(x-y)[(x+y)^2*(x+y)-(x-y)^2*(x-y)]=(x-y)[(x^3+3x^2y+3xy^2+y^3)-(x^3-3x^2y+3xy^2-y^3)]=(x-y)(2y^3+6x^2y)=-2y^4+6x^3y+2xy^3-6x^2y^2
x^2-y^2-x-y 因式分解
解：x^2-y^2-x-y =(x^2-y^2)-(x+y) 【分组分解】=(x+y)(x-y)-(x+y) 【平方差公式】=(x+y)(x-y-1) 【提取公因式(x+y) 】
(x^2-y^2)-(x+y) 因式分解
(x^2-y^2)-(x+y)=(x+y)(x-y)-(x+y)=(x+y)(x-y-1)
x的平方减y的平方减4y减4.因式分解
回答：=x^2-(y+2)^2 =(x+y+2)(x-y-2)
x的平方(x-y)+y的平方(y-x)因式分解
x的平方（x-y）+y的平方（y-x）=x的平方（x-y）-y的平方（x-y）=(x-y)(x的平方-y的平方)=(x-y)(x+y)(x-y)=(x-y)的平方（x+y）
x^2- y^2怎么分解
x^n-y^n=(x-y)(x^n-1+x^n-2y+x^n-3y^2+...+xy^n-2+y^n-1)。x^2-y^2=（x-y）（x+y）x^3-y^3=(x-y)*(x^2+xy+y^2)
因式分解(x^2-y^2)(x^4+x^2y^2+y^4)
(x^2-y^2)(x^4+x^2y^2+y^4)=(x^2-y^2)(x^4+2x^2y^2+y^4-x^2y^2)=(x^2-y^2)[(x^2+y^2)^2-x^2y^2]=(x+y)(x-y)(x^2+y^2+xy)(x^2+y^2-xy)
因式分解x^2-y^2-x-y
x^2-y^2-x-y =(x^2-x)-(y^2+y)=x(x-1)-y(y+1)
x^2-y^2-(x+y)^2,因式分解
x^2-y^2-(x+y)^2 =(x-y)(x+y)-(x+y)^2 =(x-y-x-y)(x+y)=-2y(x+y)
