# Expressions

Expression (3a-7).(3a+7) is identical with:

« Correct result ### Step-by-step explanation:

$\left(3a-7\right)\mathrm{.}\left(3a+7\right)=9{a}^{2}-49$ Did you find an error or inaccuracy? Feel free to write us. Thank you! ## Related math problems and questions:

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