x+xy+y
2x^2-3xy+6y^2-x^2+4xy-5y^2
3个回答
相关问题
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5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2)
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计算5x^3y*(-3y)^2+(-6xy)^2*(-xy)-xy^3(-4x)^2
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3x^y(-4xy^)+5xy*(-6xy)^,其中x=2 y=-1/2
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5xy^2-(3xy^2-(4xy^2-2x^2y))+2x^2y-xy^2
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x^2-2xy+3y^2=9｛4x^2-5xy+6y^2=30
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x^2-2xy+y^2=14x^2-4xy+y^2=46x^2-5xy+y^2=0x^2-4xy+3y^2+4x-8y+
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x/3y=y/2x-5y=6x-15y/x,求(4x^2-5xy+6y^2)/(x^2-2xy+3y^2)的值
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(3x-4xy-6y)-2(x-4xy+2y)
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化简：（1）-4x2y+8xy2-9x2y-21xy2（2）4（x2+xy-6）-3（2x2-xy）（3）（5x2+4x
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3x^2 y+{xy-[3x^2 y-(4xy^2 +1/2xy)]-(4x^2 y+3/2xy)}