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Mathematics 14 Online
OpenStudy (anonymous):

the product of(3x + 7)(3x - 7).

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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