November 2021 0 8 Report
решить,пользуясь формулами сокращенного умножения:   1) (2а+3b)(2a-3b) = 2) (4+y в квадрате )(4-y в квадрате) = 3) (9а-2b)(9а+2b)= 4) (3х в квадрате - 1) в квадрате = 5) (1/2 х - 1/3 у) в квадрате =
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