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一元二次方程式

Authored by 老师邱丽萍 Peng

Mathematics

7th - 8th Grade

Used 66+ times

一元二次方程式
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12 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

下列各式中,哪些是一元二次方程式。

x2+2x=12x^2+2x=12

x2−3=4xx^2-3=\frac{4}{x}

x2+2xy+y2=0x^2+2xy+y^2=0

2x3=x−12x^3=x-1

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

求  x2+5x+6=0x^2+5x+6=0  的根。

 x=3 or x=2x=3\ or\ x=2  

 x=−3 or x=−2x=-3\ or\ x=-2  

 x=−2 or x=3x=-2\ or\ x=3  

 x=−3 or x=2x=-3\ or\ x=2  

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

解 m(m−1)=72m\left(m-1\right)=72  。


 x=−8 or x=9x=-8\ or\ x=9  

 x=−9 or x=8x=-9\ or\ x=8  

 x=8 or x=9x=8\ or\ x=9  

 x=−8 or x=−9x=-8\ or\ x=-9  

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

求 (2x−1)(x−2)=5\left(2x-1\right)\left(x-2\right)=5 的根。 

 x=−12or x=3x=-\frac{1}{2}or\ x=3  

 x=12or x=−3x=\frac{1}{2}or\ x=-3  

 x=1 or x=−32x=1\ or\ x=-\frac{3}{2}  

 x=32 or x=−1x=\frac{3}{2}\ or\ x=-1  

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

以下哪一个正确的选项

x2+mx+(m2)2=(x+m)2x^2+mx+\left(\frac{m}{2}\right)^2=\left(x+m\right)^2

x2−10x+25=(x+5)2x^2-10x+25=\left(x+5\right)^2

x2+px+p2=(x+p)2x^2+px+p^2=\left(x+p\right)^2

x2−4x+16=(x−16)2x^2-4x+16=\left(x-16\right)^2

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

解 x2+9=0x^2+9=0  

wu'jie

0

3

 ±3\pm3  

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

求 x2+5x+2=0 x^2+5x+2=0\  的解集。 


 x=−5±172x=\frac{-5\pm\sqrt{17}}{2}  

 {−5±172}\left\{\frac{-5\pm\sqrt{17}}{2}\right\}  

0

wu'jie

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