计算:[(x-y)²+x+y(x-y)]÷2x
计算:(1)2/(x+y)+4y/x²-y²(2)x²/x+y-x+y
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]
x(x-y)-y(y-x)+(x-y)²因式分解
计算:1/(2x) - 1/(x+y)((x+y)/(2x) - x - y)
计算(x^2-y^2)÷(x分之x-y + y^2分之x^2-y^2 - x-y分之x+y)
计算:(x+2y)(3x-5y)-(6x的四次方y²-2x²y²)÷(2x²y&
计算:【[2/(3x)-2/(x+y)×[(x+y/(3x)-x²-xy)]】÷(x-y)/x
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
计算:(X+Y)^5÷(-X-Y)^3*(X-Y)^2
运用乘法公式计算:(1)(x-y)(x+y)-(2x-y)²
用行列式性质计算(需过程):(x,y,x+y; y,x+y,x; x+y,x,y )
(xy-x²)²÷(x-y)²/xy·x-y/x² 计算