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ludmilka2003
@ludmilka2003
October 2021
2
21
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Помогите решить пример
(2а+7б) в квадрате
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sereznova777
(2a)²+2*2a*7b+7b²
4a²+28ab+49b²
0 votes
Thanks 2
sugarsnow
(а+б)^2=а^2+2аб+б^2
4а^2+28аб+49б^2
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Thanks 0
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Answers & Comments
4a²+28ab+49b²
4а^2+28аб+49б^2