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[½»Á÷] ¡¾ÇóÖú¡¿reduce ½â³öÀ´µÄ¸ù, ÈçºÎµ¼³ö

in:=Reduce[1 + x^2 == 3, x]
out:=x == -Sqrt[2] || x == Sqrt[2]

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±ÈÈç˵, ÎÒÏëÓõڶþ¸ö¸ù Sqrt[2] ´úÈëµ½±ðµÄʽ×Ó½øÐÐÔËËã, ÈçºÎ±í´ïÄØ?
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