用配方法使下面等式成立: (1)x2-2x-3=2- ; (2)x2+0.4x+0.5=2+ ; (3)3x2+2x-2=32+ ; (4)x2+x-2=2+ . 查看更多

 

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用配方法使下面等式成立:
(1)x2-2x-3=(x-
 
2-
 

(2)x2+0.4x+0.5=(x+
 
2+
 

(3)3x2+2x-2=3(x+
 
2+
 

(4)
2
3
x2+
1
3
x-2=
2
3
(x+
 
2+
 

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用配方法使下面等式成立:

(1)x2-2x-3=(x-______)2-_______;

(2)x2+0.4x+0.5=(x+_______)2+________;

(3)3x2+2x-2=3(x+______)2+________;

(4)x2+x-2=(x+________)2+_______.

 

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用配方法使下面等式成立:
(1)x2-2x-3=(x-______)2-______;
(2)x2+0.4x+0.5=(x+______)2+______;
(3)3x2+2x-2=3(x+______)2+______;
(4)数学公式x2+数学公式x-2=数学公式(x+______)2+______.

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用配方法使下面等式成立:
(1)x2-2x-3=(x-______)2-______;
(2)x2+0.4x+0.5=(x+______)2+______;
(3)3x2+2x-2=3(x+______)2+______;
(4)
2
3
x2+
1
3
x-2=
2
3
(x+______)2+______.

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用配方法使下面等式成立:
(1)x2-2x-3=(x-    2-   
(2)x2+0.4x+0.5=(x+    2+   
(3)3x2+2x-2=3(x+    2+   
(4)x2+x-2=(x+    2+   

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