Selective Question

Simplify \dfrac{a^2-b^2}{ab}-\dfrac{ab-b^2}{ab-a^2} , its result is

  1. ×

    \dfrac{a^2-b^2+b}{a}

  2. ×

    \dfrac{a}{b}

  3. ×

    -\dfrac{a}{b}

  4. ×

    \dfrac{a^2+2b^2}{ab}

Steven Zheng Steven Zheng posted 3 months ago


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