3
锛?/p>
5
鍘绘嫭鍙?/p>
瀛?/p>
涔?/p>
鍐?/p>
瀹?/p>
涓冨勾绾ф暟瀛︿笂鍐?/p>
---
3
锛?/p>
5
鍘绘嫭鍙凤紙
2
锛?/p>
瀛?/p>
涔?/p>
鐩?/p>
鏍?/p>
浼氳繘琛岀畝鍗曠殑鏁村紡鍔狅紝鍑忚繍绠楋紟
锛?/p>
瀛︿範閲嶉毦鐐?/p>
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瀵?/p>
瀛?/p>
杩?/p>
绋?/p>
鎰熸偀
涓�锛?/p>
棰勪範
闂
1
锛庝功鏈?/p>
P86
椤靛浘
3-9
锛屽埄鐢ㄥ畠浠嫾鎴愪笉鍚屽舰鐘剁殑鍥涜竟褰紝骞惰绠楀畠浠?/p>
鐨勫懆闀匡紟
鏁村紡鐨勫姞鍑忥紝瀹為檯涓婂氨鏄?/p>
鍜?/p>
锛?/p>
闂
2
锛庡～绌猴細
锛?/p>
1
锛夊崟椤瑰紡
-x
2
銆?/p>
3x
2
銆?/p>
-4x
2
鐨勫拰绛変簬
锛?/p>
锛?/p>
2
锛夊崟椤瑰紡
-3x
2
銆?/p>
-2x
銆?/p>
4x
2
銆?/p>
-6x
鐨勫拰绛変簬
锛?/p>
锛?/p>
3
锛?/p>
锛?/p>
锛?/p>
-
锛?/p>
2a
2
+3a-1
锛?/p>
=a
2
-a+5
锛?/p>
锛?/p>
4
锛?/p>
锛?/p>
x
2
-x+6
锛?/p>
+
锛?/p>
锛?/p>
=3x
2
+x+2
锛?/p>
闂?/p>
棰?/p>
3
锛庣敱闂
1
銆?/p>
2
锛屽彲寰楀埌杩涜鏁村紡鐨勫姞鍑忚繍绠楃殑涓�鑸楠ゆ槸锛?/p>
锛?/p>
1
锛?/p>
锛?/p>
锛?/p>
2
锛?/p>
锛?/p>
浜屽睍绀轰氦娴?/p>
闂
1
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鈶?/p>
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2
-x
2
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2
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2
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锛?/p>
鍏朵腑
x=1
锛?/p>
y=-2
锛?/p>
鈶?nbsp;2x
-[4x-2(x-y)-(x+8y)]
鍏朵腑
x=3
锛?/p>
y=-4
锛?/p>
闂
2
锛?/p>
锛?/p>
1
锛夋眰姣斿椤瑰紡
3a
2
-2a+4ab+b
2
灏?/p>
5a
2
-3a
鐨勫椤瑰紡锛?/p>
锛?/p>
2
锛夊凡鐭?/p>
A
锛?/p>
x
2
-5x
锛?/p>
B=x
2
-11x+6
锛屾眰锛?/p>
2A-3
锛?/p>
A
锛?/p>
B
锛?/p>
锛?/p>