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3年数学 2次方程式とは?

Authored by Hajime BB

Mathematics

3rd Grade

Used 3+ times

3年数学 2次方程式とは?
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8 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

2次方程式を選びなさい

 x2+4x4=0x^2+4x-4=0  

 x24x=x2+5x^2-4x=x^2+5  

 x210x^2-10  

 (x3)25=x2\left(x-3\right)^2-5=x^2  

2.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

2次方程式をすべて選びなさい。

5x3=3x+75x-3=3x+7

x2+5x+7=5xx^2+5x+7=5x

(x3)2=6\left(x-3\right)^2=6

x2+8x=(x+4)2x^2+8x=\left(x+4\right)^2

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 3x28x+5=03x^2-8x+5=0  について、正しいものを選ぶ。

 a=3a=3  

 b=8b=8  

 a=3x2a=3x^2  

 b=5b=-5  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 x2x+1=0x^2-x+1=0  について、正しいものを選ぶ。

 a=1a=1  

 b=1b=1  

 c=1c=-1  

 a=x2a=x^2  

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 x=3x=3  が解の方程式を選びなさい。

 x24=5x^2-4=5  

 x2+x=x+1x^2+x=x+1  

 x2+3=0x^2+3=0  

 x21=5xx^2-1=5x  

6.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

 x2=16x^2=16  の解をすべて選びなさい。

 x=4x=4  

 x=4x=-4  

 x=8x=8  

 x=7x=7  

7.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

 x25x+6=0x^2-5x+6=0  の解をすべて選びなさい。

 x=2x=2  

 x=3x=3  

 x=1x=1  

 x=4x=4  

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