(y/(x^2-xy)+x/(y^2-xy))除以(x-y)/(xy)
(xy-x^2)乘以(xy)/(x-y)
(x^2+xy/x-y)/(xy/x-y)计算
已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理.
已知X+Y=2XY,求4X-5XY+4Y 除以X+XY+Y 的值
(xy-x²)除以xy分之x²-2xy+y²乘以x²分之x-y
(x+y-2xy)(x+y-2)+(1-xy)²
(x^2-xy)y÷y-x/xy怎么做?
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
计算:X^2-Y^2/X^2+2XY+Y^2除以X+2Y/2X^2+2XY
【x的平方-2x】除以2y-xy
x平方-2x除以2y-xy等于多少,