((x+2y)x^2+(x-y)(3x-y)-5y^2)÷2x
((x+2y)x^2+(x-y)(3x-y)-5y^2)÷2x
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
数学(x-y)^5*(y-x)^3*(x-y)^2
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
[(x+2y)^2 -(x+y)(3x-y)-5y^2]÷2x
(x-y)(x-2y)-(3x-2y)(x-3y)
1、x(x-y)(x+y)-x(x+y)^2
(2X-3y)-(5x-y)
(x-y/x+2y)³
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
计算:(3x-y)2-(2x+y)2+5x(y-x)
(3x-y)²-2x(4x-5y)-(x+2y)²