David M. answered • 11/13/13

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David M. answered • 11/13/13

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Math Tutor in Many Areas.

William S. answered • 11/13/13

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Experienced scientist, mathematician and instructor - William

(6b - 3)(6b + 3) = 36b^{2} + 18x - 18x -9 = **36b**^{2} - 9 or 9(4x^{2} - 1)

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