Factor Out the Greatest Common Factor $9 \mathrm {~m} ( 9 - \mathrm { m } ) + 5 \mathrm { n } ( 9 - \mathrm { m } )$

question 451

Multiple Choice

Factor out the greatest common factor. Simplify the factors, if possible.
- $9 \mathrm {~m} ( 9 - \mathrm { m } ) + 5 \mathrm { n } ( 9 - \mathrm { m } )$

• A) \(9 ( m + n ) ( 9 - m )\)
• B) \(m ( 9 + 5 n ) ( 9 - m )\)
• C) \(( 9 m + 5 n ) ( 9 - m )\)
• D) \(( 9 m - 5 n ) ( 9 - m )\)