(x-y)(x+xy+y)+xy(y-x)和3(x-1)-18(x-1)+27分解因式要过程拜托各位了 3Q
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|x|/x+y/|y|+xy/|xy|=
-x-3xy+y
xy-1+x-y
集合{(x,y)|xy
(x-y+4xy/x-y)(x+y-4xy/x-y)
xy(x-y)-x(x-y)²
【x(xy-xy)-y(x-xy)】÷3xy
计算:(xy-x²)×x-y/xy
【xy-x²】*xy/x-y
(xy-x²)÷(x²-2xy+y²/xy)×(x-y/x²)
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y
(x^2+xy/x-y)/(xy/x-y)计算
计算:[x(x²y²-xy)-y(x²-x³y)]/3xy
化简x^-y^/x^-2xy+y^
(-x-y)(x^2+xy+y^2)
2*(x-y)²(y-x)(xy)
(√xy -xy分之x+√xy)除以√xy -y分之x-y(x>0,y.0)