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國中數學二上4-1

Authored by 康軒 國中

Education

6th - 8th Grade

Used 9+ times

國中數學二上4-1
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10 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

將(x-4)(2x+3)=6乘開化簡後,可得下列何式?

2x2-5x-18=0

2x2-11x-18=0

2x2-5x+6=0

2x2-11x-6=0

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

下列何者是一元二次方程式?

x2+3x+2

2x+y-3=0
x(x-3)=1

2x2+5=2x2+x+3

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

若-4是方程式x2+kx+8=0的一根,則k=?

6
-6
4
-4

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

方程式9x2+21x-8=0兩根之差為多少?

1
2
3
4

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

若-1是x2-ax=b的一根,則b-a=?

1
-1
無法確定

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

0不是下列哪個方程式的解?

-2x2=0

3x2+4x=0

3x2-5x+2=x2-5x-2

3(x2-1)+5=-7x+2

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

若a為x2=5(6x-45)的一個解,則a=?

5或-15
-5或15
-15
15

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