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ecuatia de gradul 2

Authored by Titiana Al

Mathematics

9th Grade

Used 11+ times

ecuatia de gradul 2
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10 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 fie ecuatia

 2x23x2=02x^2-3x-2=0  sa se afle  Δ,x1,x2\Delta,x_1,x_2  

15,2,3

 25,2, 12-\frac{1}{2}  

25,-2, 12\frac{1}{2}  

25,-2,-1

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

 x1=1+2;x2=12,x_1=1+\sqrt{2};x_2=1-\sqrt{2},  

sa se scrie ecuatia de gradul doi ce are radacinile  x1,2x_{1,2}  

 x22x1=0x^2-2x-1=0  

 x2+2x+1=0x^2+2x+1=0  

 x2+2x1=0x^2+2x-1=0  

 x22x+1=0x^2-2x+1=0  

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

 mR,m0m\in R^{ },m\ne0   mx22(m+1)x+1+m=0mx^2-2\left(m+1\right)x+1+m=0  

sa se determine m, stiind ca ecuatia are solutii reale

 m1m\le-1  

 m<1m<-1  

 m>1m>-1  

 m1m\ge-1  

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

 mRm\in R  ,  x2mx+1=0x^2-mx+1=0  
sa se afle m, stiind ca ecuatia nu are solutii reale

 m(2,2)m\in\left(-2,2\right)  

 m[2,2]m\in\left[-2,2\right]  

 m>2m>2  

 m>2m>-2  

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

 mx2+(m+1)x2=0, cu x1,2mx^2+\left(m+1\right)x-2=0,\ cu\ x_{1,2}  solutii
sa se afle m daca x1+x2x1x2=34x_1+x_2-x_1x_2=-\frac{3}{4}  

m=4

m=-4

m=6

m=-6

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 (m+3)x2x+3m+5=0, \left(m+3\right)x^2-x+3m+5=0,\  cu  solutiile  x1,2x_{1,2}  

sa se afle m astfel incat  x1=1x2x_1=\frac{1}{x_2}  

m=2

m=1

m=-1

m=-2

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

 2x24x+1=02x^2-4x+1=0  ,  x1,2x_{1,2}  solutii
sa se afle:  x12+x22x_1^2+x_2^2  ; 1x1+1x2\frac{1}{x_1}+\frac{1}{x_2}  ;  x13+x23x_1^3+x_2^3  

4;3;9

4;3;5

3;4;9

3;4;5

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