(x+y)^2-8(x^2-y^2)-16(x-y)^2

【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) [(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 因式分解：-1/2*x*x*x*y+1/4*x*x*y*y-1/8*x*x*x*y*y*y 化简y(x+y)+(x+y)(x-y)-x^2 计算:1/(x-y)-1/(x+y)-2y/(x^2+y^2)-4y^3/(x^4+y^4)-8x^7/(x^8+y^8) (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 1、y-x/x²-y²2、(x-y)(y-z)(z-x)/(z-y)(y-x)(x-z) (x-y)²-8(x-y-2) 16-8（x-y)+(x-y)2 -8(y-x)^2×(x-y) (x-y)(2x-y-1) 因式分解x(x+y)(x-y)-x(x+y)^2 (x/x+y-x/y-x-2xy/x.x-y.y)/(1/x-1/y) 分式化简 (2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解 [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 x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x² [(2x-y)^2-y(y-4x)-8x]其中x=-1/2