ÌâÎÄ

½â´ðÌ⣺ £¨1£©x£¨y-1£©-y£¨x-1£© £¨2£©£¨x-3y£©£¨x+3y£©-£¨x-3y£©2 £¨3£© 1 2 x-2£¨x- 1 3 y2£©+£¨- 3 2 x+ 1 3 y2£©£¬ÆäÖÐx=-1£¬y= 1 2

ÌâÐÍ£º½â´ðÌâ  ÄѶȣºÖеµ

´ð°¸

£¨1£©Ô­Ê½=xy-x-xy+y=-x+y£» £¨2£©Ô­Ê½=x2-£¨3y£©2-x2+6xy+£¨3y£©2=6xy-18y2£» £¨3£©Ô­Ê½= 1 2 x-2x+ 2 3 y2- 3 2 x+ 1 3 y2=-3x+y2£¬ °Ñx=-1£¬y= 1 2 ´úÈëÉÏʽ£¬µÃ ÉÏʽ=-3¡Á£¨-1£©+( 1 2 )2 =3+ 1 4 = 13 4 £®

¾Ýר¼ÒȨÍþ·ÖÎö£¬ÊÔÌâ¡°½â´ðÌ⣺£¨1£©x£¨y-1£©-y£¨x-1£©£¨2£©£¨x-3y£©£¨x+3y£©-£¨x-3y£©2£¨3£©12x-2£¨x-13y..¡±Ö÷Òª¿¼²éÄã¶Ô  ÕûʽµÄ¼Ó¼õ³Ë³ý»ìºÏÔËËã  µÈ¿¼µãµÄÀí½â¡£¹ØÓÚÕâЩ¿¼µãµÄ¡°µµ°¸¡±ÈçÏ£º

ÕûʽµÄ¼Ó¼õ³Ë³ý»ìºÏÔËËã

¿¼µãÃû³Æ£ºÕûʽµÄ¼Ó¼õ³Ë³ý»ìºÏÔËËã

• ¼Ó·¨¡¢¼õ·¨¡¢³Ë·¨ºÍ³ý·¨£¬Í³³ÆΪËÄÔòÔËËã¡£
  ÆäÖУ¬¼Ó·¨ºÍ¼õ·¨½Ð×öµÚÒ»¼¶ÔËË㣻³Ë·¨ºÍ³ý·¨½Ð×öµÚ¶þ¼¶ÔËËã¡£
  ×¢ÒâÔËËã˳Ðò£¬ÏÈ×ö³Ë·½£¬ÔÙ×ö³Ë³ý£¬×î×ö¼Ó¼õÔËË㣬Èç¹ûÓÐͬÀàÏ¾ÍºÏ²¢Í¬ÀàÏҪÇó½á¹û±ØÐëÊÇ×î¼òÐÎʽ¡£

• »ù±¾ÔËËã˳Ðò£º
  Ö»ÓÐÒ»¼¶ÔËËãʱ£¬´Ó×óµ½ÓÒ¼ÆË㣻
  ÓÐÁ½¼¶ÔËËãʱ£¬Ïȳ˳ý,ºó¼Ó¼õ¡£
  ÓÐÀ¨ºÅʱ£¬ÏÈËãÀ¨ºÅÀïµÄ£»
  Óжà²ãÀ¨ºÅʱ£¬ÏÈËãСÀ¨ºÅÀïµÄ¡£
  ÒªÊÇÓÐƽ·½£¬ÏÈËãƽ·½¡£
  ÔÚ»ìºÏÔËËãÖУ¬ÏÈËãÀ¨ºÅÄÚµÄÊý£¬À¨ºÅ´ÓСµ½´ó£¬È»ºó´Ó¸ß¼¶µ½µÍ¼¶¡£