閰嶆柟娉?/p>
瑕佺偣鎰熺煡
1
閫氳繃閰嶆垚瀹?/p>
鍏ㄥ钩鏂瑰舰寮忔潵瑙ｄ竴鍏冧簩娆℃柟绋嬬殑鏂?/p>
娉曪紝鍙仛
______
娉?/p>
.
棰勪範缁冧範
1-1
涓嬪垪鍚勫紡鏄畬鍏ㄥ钩鏂瑰紡
鐨勬槸
( )
A.a
2
+7a+7
B.m
2
-4m-4
C.x
2
-12x+
16
1
D.y
2
-2y+2
瑕佺偣鎰熺煡
2
濡傛灉涓�鍏冧簩娆℃柟绋嬮�氳繃閰嶆柟鑳藉寲鎴?/p>
(x+n)
2
=p
鐨勫舰寮忥紝閭ｄ箞
(1)
褰?/p>
p>0
鏃讹紝鏂圭▼鏈?/p>
______
鐨勫疄鏁?/p>
鏍癸紝
______
锛?/p>
(2)
褰?/p>
p=0
鏃讹紝鏂?/p>
绋嬫湁涓や釜鐩哥瓑鐨勫疄鏁版牴
______
锛?/p>
(3)
褰?/p>
p<0
锛屾柟绋?/p>
______.
棰勪範缁冧範
2-1
鑻?/p>
(2x-1)
2
=9
锛屽垯
2x-1=______
锛屾墍浠?/p>
______
鎴?/p>
______.
鎵�浠?/p>
x
1
=______
锛?/p>
x
2
=______.
2-2
瑙ｆ柟绋嬶細
2x
2
-3x-2=0.
涓轰簡渚夸簬閰嶆柟锛?/p>
鎴戜滑灏嗗父鏁伴」绉诲埌鍙宠竟
锛?/p>
寰?/p>
2x
2
-3x=2
锛?/p>
鍐嶆妸浜屾椤圭郴鏁板寲涓?/p>
1
锛?/p>
寰?/p>
x
2
-
2
3
x=1
锛?/p>
鐒跺悗閰嶆柟锛屽緱
x
2
-
2
3
x+(
4
3
)
2
=1+(
4
3
)
2
锛涜繘涓�姝ュ緱
(x-
4
3
)
2
=
16
25
锛岃В寰楁柟绋嬬殑涓や釜鏍逛负
______.
鐭ヨ瘑鐐?/p>
1
閰嶆柟
1.
鑻?/p>
x
2
+6x+m
2
鏄竴涓畬鍏ㄥ钩鏂瑰紡锛屽垯
m
鐨勫�兼槸
( )
A.3
B.-3
C.
卤
3
D.
浠ヤ笂閮戒笉瀵?/p>
2.
鑻ユ柟绋?/p>
x
2
-mx+4=0
鐨勫乏杈规槸涓�涓畬鍏ㄥ钩鏂瑰紡锛屽垯
m
绛変簬
( )
A.
卤
2
B.
卤
4
C.2
D.4
3.
鐢?/p>
閫傚綋鐨勬暟濉┖锛?/p>
(1)x
2
-4x+______=(x-______)
2
锛?/p>
(2)m
2
卤
______m+
4
9
=(m
卤
______)
2
.
4.
(
鍚夋灄涓�?/p>
)
鑻ュ皢鏂圭▼
x
2
+6x=7
鍖栦负
(x+m)
2
=16
锛屽垯
m=______.
鐭ヨ瘑鐐?/p>
2
鐢ㄩ厤鏂规硶瑙ｆ柟绋?/p>
5.
(
鑱婂煄涓�?/p>
)
鐢ㄩ厤鏂规硶瑙ｄ竴鍏冧簩娆℃柟绋?/p>
ax
2
+bx+c=0(a
鈮?/p>
0)
锛屾鏂圭▼鍙彉褰负
( )
A.(x+
a
b
2
)
2
=
2
2
4
4
a
ac
b
飥?/p>
B.(x+
a
b
2
)
2
=
2
2
4
4
a
b
ac
飥?/p>
C.(x-
a
b
2
)
2
=
2
2
4
4
a
ac
b
飥?/p>
D.(x-
a
b
2
)
2
=
2
2
4
4
a
b
ac
飥?/p>
6.
(
鍏板窞涓�?/p>
)
鐢ㄩ厤鏂规硶瑙ｆ柟绋?/p>
x
2
-2x-1=0
鏃讹紝閰嶆柟鍚庡緱鐨勬柟绋嬩负
( )
A.(x+1)
2
=0
B.(x-1)
2
=0
C.(x+1)
2
=2
D.(x
-1)
2
=2
7.
鐢ㄩ厤鏂规硶瑙ｄ笅鍒楁柟绋嬶細
(1)x
2
-4x-2=0;
(2)2x
2
-3x-6=0
锛?/p>
(3)
3
2
x
2
+
3
1
x-2=0.
8.
鐢ㄩ厤鏂规硶瑙ｄ竴鍏冧簩娆℃柟绋?/p>
x
2
+6x-11=0
锛屽垯鏂圭▼鍙彉褰负
( )
A.(x+3)
2
=2
B.(x-3)
2
=20
C.(x+3)
2
=20
D.(x-3)
2
=2
9.
鐢ㄩ厤鏂规硶瑙ｆ柟绋?/p>
x
2
-
3
2
x+1=0
锛屾纭殑鏄?/p>
( )