SOLUTION: Last problem for study guide factor each expression m^2-4m-21 she has an answer of -7m^2+ -3m very confused since she does not have her work shown

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Question 38327: Last problem for study guide
factor each expression
m^2-4m-21 she has an answer of -7m^2+ -3m
very confused since she does not have her work shown
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
m^2-4m-21
=(m-7)(m+3)
Cheers,
Stan H.