(x+y)²-y²-1/2y²
( )-(x2+3xy)=-xy-1/3y2括号里添几
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相关问题
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先去括号,再合并同类项：3x²y-[2xy²-2（xy-2/3x²y）+xy]+3xy
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(4x^2+3xy+5y^2)-( )=4x^2-3xy-5y^2 括号里填什么?
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4x^2y-中括号2xy^2-2(xy-2分之1x^2y）中括号+3xy^2的值,其中x=4分之3,y=-1
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3x^2 y+{xy-[3x^2 y-(4xy^2 +1/2xy)]-(4x^2 y+3/2xy)}
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3xy[2xy-3(xy-1/2x^2y)]
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3xy²-[xy-2(xy-3/2x²y)+3xy²]+3xy²,其中x=3,y
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化简求值3x²y-[2xy-2（xy-3/2x²y)+xy]+3xy²其中x=3、y=-1
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(3xy^2-2x^2)(1/3xy+2xy^3),其中x=-1,y=-2
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XY=1,X+Y=3,则3XY+10Y+[5X-(2XY+2Y-3X)]
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（1）化简：3x2y-[2xy-（xy-[3/2]x2y+2xy）]