éååï¼ååå¹³æ¹åå¼æ¹ï¼ä¸»è¦æ¯ä¾¿äºå t1+t2ãt1t2 建ç«èç³»ï¼ï¼
ä» t1t2 < 0 å¯ç¥ t1ãt2 å¼å·ï¼
å æ¤ |t1|+|t2| = |t1-t2| = â[(t1-t2)^2 = â[(t1+t2)^2 - 4t1t2] ã
è¿æ¯ä¸ç§éè¦çåå½¢æå·§ï¼æ±é¿åº¦æ¶ç»å¸¸ç¨ ã
温馨提示:答案为网友推荐,仅供参考