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2014-09-10T15:58:52+03:00
(2√3+5)(5-2√3)+(4-√5)²+8√5 
= (5+2√3)(5-2√3) + 16-8√5+5+8√5
=5²-(2√3)² + 16+5 
= 25- 12 + 16+5
=  34. 
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