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利用十字交乘法解方程式(8上4-1)

Authored by 詹盛仁 詹盛仁

Mathematics

8th Grade

Used 10+ times

利用十字交乘法解方程式(8上4-1)
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8 questions

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1.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

解下列一元二次方程式

x2x-2=0

-1

-2

1

2

2.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

解下列一元二次方程式

 3x2+4x+1=03x^2+4x+1=0  

-1

 13-\frac{1}{3}  

1

 13\frac{1}{3}  

3.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

解下列一元二次方程式

 x22x3=0x^2-2x-3=0  

-1

 13-\frac{1}{3}  

1

 33  

4.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

解下列一元二次方程式

 5x26x+1=05x^2-6x+1=0  

-1

 15\frac{1}{5}  

1

 15-\frac{1}{5}  

5.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

解下列一元二次方程式

 4x22x=304x^2-2x=30  

-3

 25\frac{2}{5}  

3

 52-\frac{5}{2}  

6.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

解下列一元二次方程式

 9x2+6x=249x^2+6x=24  

-2

 43\frac{4}{3}  

2

 43-\frac{4}{3}  

7.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

解下列一元二次方程式

 10x215x=25-10x^2-15x=-25  

-1

 52\frac{5}{2}  

1

 52-\frac{5}{2}  

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