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Mathematics 20 Online
OpenStudy (anonymous):

Factor Completely a2 - 2ab - 15b2

jimthompson5910 (jim_thompson5910):

a2 - 2ab - 15b2 a2 - 5ab+3ab - 15b2 a(a - 5b)+3b(a - 5b) (a+3b)(a - 5b)

OpenStudy (aroub):

(a-5b)(a+3b)

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