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andreysuchov215
@andreysuchov215
November 2021
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2 задание пожалуйста,даю много балов!!!
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ВикаВикторовна
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А) (а-4)(а+4)-2а(3-а) = а²-16-3а+2а² = 3а²-6а-16
б) (а-8)(а-7)-(а-9)² = а²-7а-8а+56-а²+18а-81 = 3а-25
в) (b+3)(b-3)+(2b+3)² = b²-9+4b²+12b+9 = 5b²+12b
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Answers & Comments
Verified answer
А) (а-4)(а+4)-2а(3-а) = а²-16-3а+2а² = 3а²-6а-16б) (а-8)(а-7)-(а-9)² = а²-7а-8а+56-а²+18а-81 = 3а-25
в) (b+3)(b-3)+(2b+3)² = b²-9+4b²+12b+9 = 5b²+12b