49 m² +14 omn + 100n², Factorise it
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>m
2
+14m+49=0
= > m {}^{2} + 7m + 7m + 49 = 0=>m
2
+7m+7m+49=0
= > m(m + 7) + 7(m + 7) = 0=>m(m+7)+7(m+7)=0
= > (m + 7)(m + 7)=>(m+7)(m+7)
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