化简:\frac{2a}{a-9}-\frac{1}{a-3}

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化简:\frac{2a}{a-9}-\frac{1}{a-3}
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化简:\frac{2a}{a-9}-\frac{1}{a-3}
化简:\frac{2a}{a-9}-\frac{1}{a-3}

化简:\frac{2a}{a-9}-\frac{1}{a-3}
\frac{2a}{a-9}-\frac{1}{a-3}
=2a/(a-9)-1/(a-3)
=[2a(a-3)-(a-9)]/(a-9)(a-3)
=[2a^2-6a-a+9]/(a-9)(a-3)
=(2a^2-7a+9)/(a-9)(a-3)