计算:3x/(x-3)^2+x/x-3,并求当x= - 知识问答

计算:3x/(x-3)^2+x/x-3,并求当x=-2时原式的值在线等!

3个回答

3x/(x-3)^2+x/x-3
=3x/(x-3)^2+x(x-3)/(x-3)^2
=[3x+x(x-3)]/(x-3)^2
=(3x+x^2-3x)/(x-3)^2
=x^2/(x-3)^2
=4/(-2-3)^2
=4/25

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