(x-y)^2+7(x+y)-11(x-y)^2-8(x+y),先化简.再求值

(x-y)^2+7(x+y)-11(x-y)^2-8(x+y),先化简.再求值 （x-y)^2+7(x+y)-11(x-y)^2-8(X+Y)的计算过程 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 化简3(x-y)-7(x--y)+2(y-x) 化简y(x+y)+(x+y)(x-y)-x^2 因式分解x(x+y)(x-y)-x(x+y)^2 (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(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^2(x-y)+(y-x) x(x-y)2-(y-x)3 {(x,y) |x|+|y| x>y?x:y 大括号x+y/2+x-y/3=11/6 4(x+y)-5(x-y)=7 快 (x-y)的平方+7（x+y)-11（x-y)的平方-8（x+y) 求做因式分解12(x+y)^2+11(x+y)(x-y)+2(x-y)^2 计算:y-x分之x+y+x-y分之y-y-x分之2x-y 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27