1. (m-7)(m+7)
2. (2b-11c)(2b+c)
3. (5m^2-k^2p2)5m
4. (12m-3n)(12m+3n)
Вроде так
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Answers & Comments
1. (m-7)(m+7)
2. (2b-11c)(2b+c)
3. (5m^2-k^2p2)5m
4. (12m-3n)(12m+3n)
Вроде так