因式分解x²(x-2y)+y²(2y-x)
①(2x+y-3)²②(3x+2y-4)(3x+2y+4)这两道题怎么算?
(x-y/x+2y)³
计算:(1)2/(x+y)+4y/x²-y²(2)x²/x+y-x+y
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
{(x-y)²+(x+y)(x-y)}÷2x
(5*x+2*y)/(x+y)=3,求x与y的关系,是不是x=2y?怎么算?
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y
x(x-y)-y(y-x)+(x-y)²因式分解
(x-y)(x-2y)-(3x-2y)(x-3y)
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(