ÌâÄ¿ÄÚÈÝ
¼×¡¢ÒÒ¡¢±û¡¢¶¡ËÄÈ˹²Í¬Ì½ÌÖ´úÊýʽx2£4x+5µÄÖµµÄÇé¿ö£®¼¸·ÖÖӺ󣬸÷×Ôͨ±¨Ì½¾¿µÄ½áÂÛ
¢Ù£®¼×ÈÏΪֻÓе±x=2ʱ£¬x2£4x+5µÄֵΪ1
¢Ú£®ÒÒÈÏΪÕÒ²»µ½ÊµÊýx£¬Ê¹x2£4x+5µÄֵΪ0
¢Û£®±û·¢ÏÖx2£4x+5µÄÖµËæxµÄ±ä»¯¶ø±ä»¯£¬Òò´ËÈÏΪûÓÐ×îСֵ
¢Ü£®¶¡·¢ÏÖµ±xÈ¡´óÓÚ2µÄʵÊýʱ£¬x2£4x+5µÄÖµËæxµÄÔö´ó¶øÔö´ó£¬
Òò´ËÈÏΪûÓÐ×î´óÖµ
ÉÏÊö½áÂÛÆäÖÐÕýÈ·µÄÊÇ £¨ÌîÐòºÅ£©£¨Ô´´£©
¢Ù¢Ú¢Ü
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿