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karina20002010
@karina20002010
August 2022
2
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(3a -b)(a+b)+(b-3a)(b+3a)
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anettach
(3а-b)(a+b)+(b-3a)(b+3a)=3a2+3ab-ab-b2+b2+3ab-3ab-3a2=3ab-ab=2ab
вроде бы так))
6 votes
Thanks 5
Кокетка98
(3a -b)(a+b)+(b-3a)(b+3a)=3a
²+3ab-ab-b²+b²+3ab-3ab-9a²=-6a²+2ab=-2a(3a-2b)
3 votes
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вроде бы так))