計算(x-2y)^2
(x-y/x+2y)³
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
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
(x-y)(x-2y)-(3x-2y)(x-3y)
(x-2y)²+(2x-4y)(x+y)+(x+y)²
分解下列因式:x(y-x)+y(y-x)-(x-y)^2
(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
计算:1/(2x) - 1/(x+y)((x+y)/(2x) - x - y)
1、x(x-y)(x+y)-x(x+y)^2