TOÁN 9-PT BAC HAI

TOÁN 9-PT BAC HAI

9th Grade

10 Qs

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TOÁN 9-PT BAC HAI

TOÁN 9-PT BAC HAI

Assessment

Quiz

Mathematics

9th Grade

Hard

Created by

Trần Chi

Used 36+ times

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10 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Tìm x, biết x2 + 5x = 0

x = 0

x = 5

x = -5

x = 0; 5

2.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Tìm x, biết   x2x^2   -5 = 0

5

 5\sqrt{5}  

 5-\sqrt{5}  

5; -5

3.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Tìm x, biết     x23x+2=0x^2-3x+2=0  

1

0

2

-2

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 k2x2+5x1=0k^2x^2+\sqrt{5}x-1=0 , k \ne  0 

Cho biết số nghiệm của phương trình sau:

Nghiệm kép

hai nghiệm phân biệt

vô nghiệm

5.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

Phương trình bậc hai ax2+bx+c=0ax^2+bx+c=0  , a 0\ne0  

có nghiệm kép  \leftrightarrow  

 Δ>0\Delta>0  

 Δ<0\Delta<0  

 Δ0\Delta\ge0  

 Δ=0\Delta=0  

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Phương trình x2 + mx -4 = 0.

Với m = 0 thì phương trình có nghiệm là:

x=±1x=\pm1

x=±2x=\pm2

x = 4

x = 2

7.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Phương trình x22(m+1)x1=0x^2-2\left(m+1\right)x-1=0  có hệ số b là


1

2(m + 1)

-2(m + 1)

-1

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