Seudónimo Seudónimo
  • 11-02-2018
  • Mathematics
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plz help :)))))))))))))))))))

plz help class=

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Аноним Аноним
  • 12-02-2018
(2 - 7z)(2 + 7z)
= (2)^2 - (7z)^2
= 4 - 49z^2

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