Seudónimo
Seudónimo
11-02-2018
Mathematics
contestada
plz help :)))))))))))))))))))
Respuesta :
Аноним
Аноним
12-02-2018
(2 - 7z)(2 + 7z)
= (2)^2 - (7z)^2
= 4 - 49z^2
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