(2x^3y-4x^2y^3-7xy^3)÷(-2xy)写出过程
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
因式分解 求过程 x-xy+3y-3x 2x+xy-y-4x+5y-6
2x平方y-2xy+3xy平方+5+2xy+x平方y-3xy平方-3 过程!
分式除法(2y-x)÷x²-4xy+4y²/x+3xy要过程
xy=-2,x+y=3,求代数式(4xy+12y)+[7x-(3xy+4y-x)]
已知1/X+2/X=2,求代数式(4X+3XY+2Y)/(-4X+8XY-2Y)的值.写出解题思路和过程..
(-3x^y+2xy)-( )=4x^+xy
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
[-(x-y)^2/xy]^-4*(y^2-xy/x)^3*(x^4/y^10)÷(xy-y^2/x)^-5=-y(y-
3y/2x+2y + 2xy/x²+xy等于多少过程
已知x-y=4xy,则2x+3xy-2yx-2xy-y
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)