填空:(1)3x^2+6xy/(x+y)(x+2y)=3x/()(1)3x²+6xy/(x+y)(x+2y)=3x/( )(2)3a/a-b = 6a²+6ab/( )
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(X-3xy+4xy-y)-[-2x-2(xy-3/2xy)-y]+6xy的过程
【数学填空题】已知xy=3,x+y=-1,则x²y+xy²=() x³-2x²+x=() x³-x=()【数学填空题】已知xy=3,x+y=-1,则x²y+xy²=()x³-2x²+x=() x³-x=() x³-16x=() 2x²-12x+
x²-y²+5x+3y+4(x+y-2xy)(x+y-z)+(xy-1)²
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填空:(1)3x^2+6xy/(x+y)(x+2y)=3x/()(1)3x²+6xy/(x+y)(x+2y)=3x/( )(2)3a/a-b = 6a²+6ab/( )
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