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八年級數學-一元二次方程式

Authored by 蔡佩旻 蔡佩旻

Mathematics

8th Grade

Used 12+ times

八年級數學-一元二次方程式
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20 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

下列何者化簡後為一元二次方程式?

-3x2-5x+4

(5x-2)(7x-3)=x-2 

6x2-2x+3=6x2+x+4

(x+3)2=x2

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

已知方程式(x-1)(3x+2)=0,則 3x+2=? 

5 或 0

-2/3或 0

-或 1

0

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

下列何者為方程式 x2+10x=0 的解? 

10

-10 

5

-5

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

下列選項中,哪個可以是(x+1)(x-2)=18 的解? 

3

4

5

6

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

若 a 是 4x2-5x-2=0 的解,則 8a2-10a+3=? 

7

8

9

10

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

關於(x+2)(x-3)=-4 的敘述,下列何者正確? 

可由(x+2)=2,(x-3)=-2 找到 x 的解

x 會有無限多個解 

x 的解為-1 或-4

 x 的解為 2 或-1

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

下列各方程式何者的根恰有一個為 0? 

 4x+3=0 

x2-4=0

3x2+5x=0 

3x2-10x-8=0

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