[6(2X-Y)^3-4Y(Y-2X)^2]/2(Y-2X)^2
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[6(2X-Y)^3-4Y(Y-2X)^2]/2(Y-2X)^2[6(2X-Y)^3-4Y(Y-2X)^2]/2(Y-2X)^2[6(2X-Y)^3-4Y(Y-2X)^2]/2(Y-2X)^2原式=[
[6(2X-Y)^3-4Y(Y-2X)^2]/2(Y-2X)^2
[6(2X-Y)^3-4Y(Y-2X)^2]/2(Y-2X)^2
[6(2X-Y)^3-4Y(Y-2X)^2]/2(Y-2X)^2
原式=[6(2x-y)³-4y(y-2x)²]/[2(y-2x)²]
=[6(2x-y)³-4y(2x-y)²]/[2(2x-y)²]
=[6(2x-y)³÷[2(2x-y)²]-[4y(2x-y)²]÷[2(2x-y)²]
=6÷2×(2x-y)³÷(2x-y)²-4÷2×y×(2x-y)²÷(2x-y)²
=3(2x-y)-2y
=6x-3y-2y
=6x-5y
4x-3y/x-2y÷6y-8x/y-2x
（x+y）/2- x-y/2=6 3(x+y)=4(x-y)
x+y/3+x-y/2=6 4(x+y)-2(x-y)=40
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
（y-x）^4（x-y）^3+2（x-y）^6（y-x）
【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-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
[6(2X-Y)^3-4Y(Y-2X)^2]/2(Y-2X)^2
1.（（y+2x)(-2x+y)+4(x+2y)^2)/3y 2.（2(x-y)^3-8(x-y）^2(x+y)+6y(x-y)^2）/2（x-y)^2
(x+3y-4)(2x-y)
计算（2x-3y)(x+4y)-(3x+y)(x-2y)（2x-3y)(x+4y)-(3x+y)(x-2y)
因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y)
[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?