Answer
$= \log_5 x^{9}$
Work Step by Step
$= 7\log_5 x + 2\log_5 x$
$= \log_5 x^{7} + \log_5 x^{2}$
$= \log_5 x^{7}x^{2}$
$= \log_5 x^{9}$
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