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Mathematics 12 Online
OpenStudy (anonymous):

Multiply (ab-15)(ab+10) I will give medal!

OpenStudy (comm.dan):

Factor out then tell us what you get as your answer

OpenStudy (anonymous):

Use the FOIL Method: (ab-15)(ab+10) first a^2b2 outer ab(10) or 10ab inner -15ab last (-15)10 = -150 Combine together a^2b2 - 5ab -150

OpenStudy (comm.dan):

Yes @DSS

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