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利用配方法解一元二次方程式(8上4-2)

Authored by 詹盛仁 詹盛仁

Mathematics

8th Grade

Used 14+ times

利用配方法解一元二次方程式(8上4-2)
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10 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

解一元二次方程式

 x2+2x1=0x^2+2x-1=0  

 1±2-1\pm\sqrt{2}  

 1±21\pm\sqrt{2}  

 1±22\frac{-1\pm\sqrt{2}}{2}  

 1±22\frac{1\pm\sqrt{2}}{2}  

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

解一元二次方程式

 x2+4x+1=0x^2+4x+1=0  

 2±5-2\pm\sqrt{5}  

 2±3-2\pm\sqrt{3}  

 2±52\pm\sqrt{5}  

 2±32\pm\sqrt{3}  

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

解一元二次方程式

 x2+6x1=0x^2+6x-1=0  

 3±10-3\pm\sqrt{10}  

 3±37-3\pm\sqrt{37}  

 3±103\pm\sqrt{10}  

 3±37-3\pm\sqrt{37}  

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

解一元二次方程式

 x28x+9=0x^2-8x+9=0  

 4±74\pm\sqrt{7}  

 9 ,19\ ,-1  

 4±55-4\pm\sqrt{55}  

 4±554\pm\sqrt{55}  

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

解一元二次方程式

 x2=22xx^2=2-2x  

 1±3-1\pm\sqrt{3}  

 0,20,-2  

 1±31\pm\sqrt{3}  

 1±5-1\pm\sqrt{5}  

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

解一元二次方程式

 x2=43xx^2=4-3x  

 2±3-2\pm\sqrt{3}  

 1,41,-4  

 3±53\pm\sqrt{5}  

 3±5-3\pm\sqrt{5}  

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

解一元二次方程式

 x2=4x1x^2=4x-1  

 2±3-2\pm\sqrt{3}  

 2±32\pm\sqrt{3}  

 3±2-3\pm\sqrt{2}  

 2±5-2\pm\sqrt{5}  

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