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Mathematics 9 Online
OpenStudy (anonymous):

Factor: 16a2 - 25b2 Edit: I got (4a-5b)(4a+5b) but when I try to check the answer with FOIL I get just 16a^3 and this confuses me. Can someone explain?

OpenStudy (anonymous):

(4a-5b)(4a+5b)

OpenStudy (anonymous):

Oh, that's what I got. Thanks so much! I'm just confused because I tried to check it with FOIL and it didn't come out right.

OpenStudy (anonymous):

can u give me a medal

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