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1230a
@1230a
November 2021
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Выполните умножение: - 3с (7с - 3) (-6с + 9)
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Neу4
- 3с (7с-3) (-6с+9) = -3с • 7с - 3 • (-6с) + 9 =
-21с - 3 (-6с) + 9 = -21с - (-6с) • 3 - 9 = -15с • (-6)
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-21с - 3 (-6с) + 9 = -21с - (-6с) • 3 - 9 = -15с • (-6)