计算:(xy-x²)×x-y/xy
计算:(xy-x²)×x-y/xy
计算:(xy-x²)乘 x-y分之xy
计算:x²+2xy+y²/xy-y².x²-2xy+y²/xy+y
(x^2+xy/x-y)/(xy/x-y)计算
(xy-x²)²÷(x-y)²/xy·x-y/x² 计算
计算;(xy-x²)÷x²-2xy+y²/xy · x-y/x²
计算:(x-y)(x²+xy+y²)
计算:-2x²y(-2xy²)²+(2xy)³·(xy²)
计算3xy[2xy-x(y-2)+x-1]
计算:3xy[2xy-x(y-2)+x]
x²/xy-x/y
.先化简,后计算.[2x(x²y-xy²)+xy(xy-x²)]/x²yx=20