N
nhok_kute251197


(x+\sqrt{x^2+2012})(y+\sqrt{y^2+2012})=2012
\Leftrightarrow(x-\sqrt{x^2+2012})(x+\sqrt{x^2+2012})(y+\sqrt{y^2+20 12})=2012(x-\sqrt{x^2+2012})
\Leftrightarrow -2012 (y+\sqrt{y^2+2012})= 2012(x-\sqrt{x^2+2012})
\Leftrightarrow x+y= \sqrt{x^2+2012}-\sqrt{y^2+2012} (1)
Tuong tu:x+y=\sqrt{y^2+2012}-\sqrt{x^2+2012}(2)
(1)+(2): x+y=0
@Mod: Bạn làm gì vậy?
\Leftrightarrow(x-\sqrt{x^2+2012})(x+\sqrt{x^2+2012})(y+\sqrt{y^2+20 12})=2012(x-\sqrt{x^2+2012})
\Leftrightarrow -2012 (y+\sqrt{y^2+2012})= 2012(x-\sqrt{x^2+2012})
\Leftrightarrow x+y= \sqrt{x^2+2012}-\sqrt{y^2+2012} (1)
Tuong tu:x+y=\sqrt{y^2+2012}-\sqrt{x^2+2012}(2)
(1)+(2): x+y=0
@Mod: Bạn làm gì vậy?
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