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OpenStudy (anonymous):
factor completely 81a^2-25
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OpenStudy (agentnao):
(9a+5) (9a-5)
OpenStudy (hoblos):
=(9a+5)(9a-5)
OpenStudy (anonymous):
ok i had (9a-5)(9a+5). should it matter which way we have it?
OpenStudy (hoblos):
it is the same
OpenStudy (anonymous):
(a+b) (a-b) = a^2 - b^2
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OpenStudy (anonymous):
i always ask that, i want ot make sure
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