计算:(x-y)^2*(y-x)^4*(x-y)
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
计算:1/(2x) - 1/(x+y)((x+y)/(2x) - x - y)
计算4xy+(x-2y)的平方+(x+3y)(3y-x)
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]
计算:(x-4y)(2x+3y)-(x+2y)(x-y).
用行列式性质计算(需过程):(x,y,x+y; y,x+y,x; x+y,x,y )
计算:(3x-y)2-(2x+y)2+5x(y-x)
(x+y)^2-(3x-2y)^2计算
初二下册计算:(x-y /x+2y)³
计算 1.(-2x)^3-3x乘(x-2x^2) 2.【(x+2y)^2-(x-2y)(x+2y)】÷4y
运用平方差计算..(-x+y)(-x-y)(-x+y)(x+y)
计算:(1)2/(x+y)+4y/x²-y²(2)x²/x+y-x+y