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