How do u factor $25 a^{2} - 36 b^{2}$ ?

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Solution

$\begin{matrix} u sin g t h e i d e n t i t y a^{2} - b^{2} = (a - b) . (a + b) N o w, 25 a^{2} - 36 b^{2} = {(5 a)}^{2} - {(6 b)}^{2} = (5 a - 6 b) . (5 a + 6 b) \end{matrix}$

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