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Ответ:

[tex] \frac{9m {}^{2} - 1 }{9m {}^{2} - 6m + 1} = \frac{(3m - 1) \times (3m + 1)}{(3m - 1) {}^{2} } = \frac{3m + 1}{3m - 1} [/tex]

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Ответ:

\frac{9m {}^{2} - 1 }{9m {}^{2} - 6m + 1} = \frac{(3m - 1) \times (3m + 1)}{(3m - 1) {}^{2} } = \frac{3m + 1}{3m - 1}9m2−6m+19m2−1=(3m−1)2(3m−1)×(3m+1)=3m−13m+1