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Old 09 ÁԶعÒ¹ 2009, 20:03
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Old 09 ÁԶعÒ¹ 2009, 20:06
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$$(\sqrt{2x-1}+2\sqrt{x+3})^2=2x-1+4\sqrt{2x^2+5x-3}+4(x+3)=6x+11+4\sqrt{2x^2+5x-3}$$
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