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Автор - hristinkaa

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Ответ

Автор - Llma

Ответ:

Объяснение:

(а-3√а)/а-9=√а(√а-3)/(√а-3)(√а+3)=√а/(√а+3)

Ответ

Автор - Regent1828

displaystyle tt  frac{a-3sqrt{a}}{a-9}=frac{sqrt{a}cdot(sqrt{a}-3)}{(sqrt{a})^{2}-3^{2}}=frac{sqrt{a}cdot(sqrt{a}-3)}{(sqrt{a}-3)(sqrt{a}+3)}=frac{sqrt{a}}{sqrt{a}+3};

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