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posted by Tristan on Monday, June 9, 2008 at 9:41pm.

(ã5 + 5ã6)(ã5 - 5ã6) is the answer -145 ???

a^2 - b^2 = (a+b)(a-b) here we have a = sqrt 5 b = 5 sqrt 6 a^2 = 5 b^2 = 25*6 = 150 5 - 150 = -145 so yes

ty Sir

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