Ответ:
А) (3у-5)² = 9у² - 30у + 25
Б) (7х+1)(7х-1) = 49х² - 1
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Ответ:
А) (3у-5)² = 9у² - 30у + 25
Б) (7х+1)(7х-1) = 49х² - 1