AdoNice
01.06.2021 •
Mathematics
George and lee sung sell stereos last month George sold 19 more stereos than lee sung. Together they sold 153 how many stereos did lee sung lee sell
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Ответ:
49b^2 + 42b + 9 = (7b + 3) * (7b + 3) = (7b + 3)^2 = 7^2b^2 + 2 * 3 * 7b + 3^2 = 49b^2 + 42b + 9
The correct result would be a. (7b + 3)^2.