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

is the answer -145 ???

- Math -
**Damon**, Monday, June 9, 2008 at 9:49pma^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

- Math -
**Tristan**, Monday, June 9, 2008 at 9:52pmty Sir

- Math -

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