x+y)(x-y)+(x-y)^2-(6x^2y-2xy^2)/2y,其中x=-2,y=1/3

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x+y)(x-y)+(x-y)^2-(6x^2y-2xy^2)/2y,其中x=-2,y=1/3
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x+y)(x-y)+(x-y)^2-(6x^2y-2xy^2)/2y,其中x=-2,y=1/3
x+y)(x-y)+(x-y)^2-(6x^2y-2xy^2)/2y,其中x=-2,y=1/3

x+y)(x-y)+(x-y)^2-(6x^2y-2xy^2)/2y,其中x=-2,y=1/3
x+y)(x-y)+(x-y)^2-(6x^2y-2xy^2)/2y
=x^2-y^2+x^2-2xy+y^2-3x^2+xy
=-x^2-xy
=-(-2)^2-(-2)(1/3)
=-4+2/3
=-10/3

(X+Y)(X－Y)+(X－Y)的平方－（6x的平方Y－2xy的平方）/2y =（x-y）（x+y+x-y)-（3x^2-xy) =2x(x-y)-3x^2+xy =2x^2-2xy-3x^2+xy =-x^2-xy =-4-(-2)*1/3 =-4+2/3 =-10/3能不能列好一点(X+Y)(X－Y)+(X－Y)的平方－（6x的平方Y－2xy的平方）/2y
=（x-y）（x+y+x-y...

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(X+Y)(X－Y)+(X－Y)的平方－（6x的平方Y－2xy的平方）/2y =（x-y）（x+y+x-y)-（3x^2-xy) =2x(x-y)-3x^2+xy =2x^2-2xy-3x^2+xy =-x^2-xy =-4-(-2)*1/3 =-4+2/3 =-10/3

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答案8

【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-x+y/y-(x+y)(x-y)/y² y/x=2 化简y(x+y)+(x+y)(x-y)-x^2 计算:(x-y)^2*(y-x)^2*(x-y)^6 6(x+y)2-2(x-y)(x+y)因式分解 (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 (x+y)^2+6(x+y)+9 因式分解x(x+y)(x-y)-x(x+y)^2 {(x,y) |x|+|y| 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 3y/x*x-y*y+x/x*x-2xy+y*y+6y*y/x*x*x-x*x*y-xy*y+y*y*y等于多少? 因式分解3x^2(x-y)+6x(y-x) 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= [(x-y)^2-(x+2y)(x-2y)]/y 计算:y-x分之x+y+x-y分之y-y-x分之2x-y [(2x+y)平方+(2x+y)(y-2x)-6y]/(2y) x^2(x-y)+(y-x)