SOLUTION: M2+8m+7

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Question 733137: M2+8m+7
Answer by vidhyak(98) About Me  (Show Source):
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M^2+8m+7
8m is split as m +7m
m^2 + m + 7m +7
Group first two terms and last two terms together
(m^2+M) + (7m + 7)
m(m+1) + 7(m+1)

take the common term m+1
(m+1)(m+7)

M= -1, -7