[(x-2y)²+(x+y)(3x-y)-3y²]÷2x
急![(3x+y)²-3(3x-y)(x+y)-(x-3y)(x+3y)]÷(2xy)
(x-y)X(2x-2y)²X(3x-3y)²
化简后求值 [(x-2y)²+(x-2y)(x-2y)-2x(2x-y)]÷2x 其中x=2 y=3
[(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
有这样一道题:"计算(2*x*x*x-3*x*x*y-2*x*y*y)-(x*x*x-2*x*y*y+y*y*y)+【-
[(3x+y)²-(3x-y)²]÷(4x-2y)计算 怎么做?
[(x+2y)^2 -(x+y)(3x-y)-5y^2]÷2x
[(2x+y)(x-3y)+y(x+3y)]÷(2x)计算,
计算:(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2
(2x-y)²-4(x-y)(x+2y)