Hola! :3
Resolvemos:
m²-49 = (m+7)(m-7)
m²-49 = m(m)+m(-7)+7(m)+7(-7)
m²-49 = m²-7m+7m-49
m²-49 = m²+0m-49
m²-49 = m²-49
Espero haberte ayudado :D
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Hola! :3
Resolvemos:
m²-49 = (m+7)(m-7)
m²-49 = m(m)+m(-7)+7(m)+7(-7)
m²-49 = m²-7m+7m-49
m²-49 = m²+0m-49
m²-49 = m²-49
Espero haberte ayudado :D