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Mathematics 7 Online
OpenStudy (anonymous):

9m^2-30m+21

OpenStudy (lgbasallote):

m = 7/3; m = 1

OpenStudy (lgbasallote):

(9m-21)(m-1)

OpenStudy (anonymous):

9m^2-9m-21+21= 9m(m-1)-21(m-1)= (9m-21)(m-1)

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