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posted by ali Sunday, March 27, 2011 at 6:57pm.

simplify and state the restrictions of a^2- 9b^2 / 5a^2-11ab-12b^2

= (a-3b)(a+3b)/((5a+4b)(a-3b)) = (a+3b)/(5a+4b) , a ≠ 3b

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