#### Answer

(m-7n)(m+4n)

#### Work Step by Step

$m^{2}$ - 7 mn + 4 mn - $28n^{2}$
Find the GCD of the first two and the GDC of the last two terms.
m(m -7n) +4n(m-7n)
We take (m-7n) and factor it out which gives us.
(m-7n)(m+4n)

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Published by
Prentice Hall

ISBN 10:
0133500403

ISBN 13:
978-0-13350-040-0

(m-7n)(m+4n)

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