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OpenStudy (anonymous):
the product of(3x + 7)(3x - 7).
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OpenStudy (anonymous):
multiply everything in both parenthesis like terms
OpenStudy (anonymous):
9x^2-49
OpenStudy (anonymous):
http://sketchtoy.com/61412609 or the easiest way: http://sketchtoy.com/61412627 since they have an opposite operation
OpenStudy (anonymous):
(3x+7)(3x-7) =9x^2-21x+21x-49 -21x and 21x cancel out = 9x^2-49
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