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濂嬫枟娌℃湁缁堢偣浠讳綍鏃跺�欓兘鏄竴涓捣鐐?/p>
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淇¤揪
鍒濅腑鏁板璇曞嵎
銆婅В涓�鍏冧簩娆℃柟绋嬨�嬬
1
璇炬椂
閰嶆柟娉?/p>
璇句笅浣滀笟
绉疮鈼忔暣鍚?/p>
1
銆佹柟绋嬶紙
x+1
锛?/p>
2
-3=0
鐨勬牴鏄紙
锛?/p>
A
锛?/p>
x
1
=1+
3
锛?/p>
x
2
=1-
3
B
锛?/p>
x
1
=1+
3
锛?/p>
x
2
=-1+
3
C
锛?/p>
x
1
=-1+
3
锛?/p>
x
2
=-1-
3
D
锛?/p>
x
1
=-1-
3
锛?/p>
x
2
=1+
3
2
銆佷笅鍒楁柟绋嬩腑锛屾棤瀹炴暟鏍圭殑鏄紙
锛?/p>
A
锛?/p>
x
2
=4
B
锛?/p>
x
2
=2
C
锛?/p>
4x
2
+25=0
D
锛?/p>
4x
2
-25=0
3
銆佷笅鍒楀悇鍛介涓纭殑鏄紙
锛?/p>
鈶犳柟绋?/p>
x
2
=-4
鐨勬牴涓?/p>
x
1
=2
锛?/p>
x
2
=-2
鈶♀埖锛?/p>
x-3
锛?/p>
2
=2
锛屸埓
x-3=
2
飩?/p>
锛屽嵆
x=3
卤
2
鈶⑩埖
x
2
-
16
=0
锛屸埓
x=
卤
4
鈶ｅ湪鏂圭▼
ax
2
+c=0
涓紝褰?/p>
a
鈮?/p>
0
锛?/p>
c
锛?/p>
0
鏃讹紝涓�瀹氭棤瀹炴牴
A
锛庘憼鈶?/p>
B
锛庘憽鈶?/p>