化简(x-y)^3乘以(y-x)^2为
化简(x-y)^3乘以(y-x)^2为
(x/x+y +2y/x+y)乘以xy/ x+2y除以(1/x+1/y)(2)(3x^2/4y)^2乘以2y/3x+ x
若(3x+2y-4)的绝对值与9乘以(5x+7y-3)的二次方互为相反数,则x、y为多少?
(x-y)^0除以(x-y)^-3乘以(y-x)^-2
计算[3x分之2-(x+y分之2)乘以[3x分之x+(y-x^2-xy)]除以x分之x-y
(2X-3Y-1)乘以(2X+3Y+1)等于多少
化简 x乘以根号下(y/x
(xy-x^2)乘以(xy)/(x-y)
(x-y)平方乘以(x-y)的3次方乘以(y-x)平方乘以(y-x)的3次方
已知xy满足方程组{x+2y=3,x-y=-2.求x/(x-y)平方乘以x方-y方/x+y+(2x+2/x-y)-2的值
已知x=2+根号3,y=2-根号3,计算代数式(x+y/x-y-x-y/x+y)乘以(1/x^2-1/y^2)
设x、y是有理数,并且x、y满足x的平方+2y+(y乘以根号2)=17-4乘以根号2,求x+y