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			Giải phương trình :
\sqrt{x-2+\sqrt{2\cdot x+5}}+\sqrt{x+2+3\cdot \sqrt{2\cdot x-5}}=7\cdot \sqrt{2}
			
		 
	 
 
			
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			Bài 1 Tính B=
(\sqrt{10}-\sqrt{2})\cdot \sqrt{3+\sqrt{6}}