(x+5y)²-(2x+10y)(3x-y)+(3x-y)²
数学(x-y)^5*(y-x)^3*(x-y)^2
(3x-y)²-2x(4x-5y)-(x+2y)²
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
急![(3x+y)²-3(3x-y)(x+y)-(x-3y)(x+3y)]÷(2xy)
(2X-3y)-(5x-y)
(x-y)X(2x-2y)²X(3x-3y)²
合并同类项:-6x²y-x+5x²y-2x+x³y+3x
若【2x²-3y²-10y+5】²+根号x-2y,则x= y=
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
【x-3y][x+y]-[x-2y][x +2y]-[x-y
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y