灏忓
+
鍒濅腑
+
楂樹腑
+
鍔姏
=
澶у
灏忓
+
鍒濅腑
+
楂樹腑
+
鍔姏
=
澶у
鍚岀被椤?/p>
璇鹃锛?/p>
2.2.1
鍚岀被椤?/p>
瀛︿範鐩爣锛?/p>
1.
鐞嗚В鍚岀被椤圭殑姒傚康锛岃璇嗗悓绫婚」銆?/p>
2.
鐞嗚В鍚堝苟鍚岀被椤圭殑姒傚康锛屾帉鎻″悎骞跺悓绫婚」鐨勬硶鍒欍�?/p>
3.
閫氳繃灏忕粍璁ㄨ銆佸悎浣滀氦娴佺瓑瀛︿範鏂瑰紡锛岀粡鍘嗘蹇电殑褰㈡垚杩囩▼锛屽煿鍏诲鐢熻嚜涓绘帰
鎵�鐭ヨ瘑鍚堜綔浜ゆ祦鐨勮兘鍔涖�?/p>
瀛︿範閲嶇偣
1.
鐞嗚В鍚岀被椤圭殑姒傚康
2.
鎺屾彙鍚堝苟鍚岀被椤圭殑娉曞垯
瀛︿範闅剧偣
鏍规嵁鍚岀被椤圭殑姒傚康鍦ㄥ椤瑰紡涓壘鍚岀被椤广�?/p>
瀛︿範杩囩▼锛堝妗堬級
澶囨敞
涓�銆佸紩瀵煎洖椤撅紝鎼缓妗ユ
1. 2x
2
y
3
鐨勭郴鏁版槸
,
娆℃暟鏄?/p>
銆?/p>
2. -
5
1
a
2
bc
鐨勭郴鏁版槸
,
娆℃暟鏄?/p>
銆?/p>
3. 3x
2
y+2xy-3
鏄?/p>
娆?/p>
椤瑰紡銆?/p>
浜屻�佽嚜涓诲涔狅紝娣卞叆閽荤爺
锛堥槄璇昏鏈苟瀹屾垚涓嬪垪鍚勯锛?/p>
涔樻硶鍒嗛厤寰嬶細
a(b+c)= ,
涔樻硶鍒嗛厤寰嬬殑閫嗚繍绠楋細
ab+ac=
4.
渚濇嵁涔樻硶鍒嗛厤寰嬬殑閫嗚繍绠楄繘琛岃绠楋細
锛?/p>
1
锛?
3
1
脳锛?/p>
-4
锛?/p>
+
3
2
脳锛?/p>
-4
锛?/p>
=
锛?/p>
锛?/p>
2
锛?/p>
5y
2
+7y
2
=
锛?/p>
(3)4a
2
b-7a
2
b=
銆?/p>
鍒?/p>
鍒?/p>
瑙?/p>
瀵?/p>
锛?/p>
2
锛?/p>
銆?/p>
锛?/p>
3
锛?/p>
涓?/p>
鐨?/p>
澶?/p>
椤?/p>
寮?/p>
鐨?/p>
椤?/p>
鐨?/p>
鍏?/p>
鍚?/p>
鐗?/p>
寰?/p>
鏄?/p>
锛?/p>
鐩?/p>
鍚?/p>
锛?/p>
_____________
涔熺浉鍚屻�?/p>
褰掔撼锛?/p>
鍚岀被椤癸細
鐩稿悓锛?/p>
骞朵笖
涔熺浉鍚岀殑椤瑰彨鍚岀被椤癸紝
__________
_____
涔熸槸鍚岀被椤广�?/p>
5
銆佸垽鏂笅鍒楀悇缁勫紡瀛愭槸鍚︽槸鍚岀被椤癸細
锛?/p>
1
锛?/p>
3x
2
y
涓?/p>
2xy
2
锛?/p>
锛?/p>
(2) a
2
b
涓?/p>
2
1
ab
2
锛?/p>
锛?/p>