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Ecuatii de gradul 2

Authored by Maria Cornianu

Mathematics

7th Grade

Used 39+ times

Ecuatii de gradul 2
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19 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Solutiile reale ale ecuatiei

 x2x^2  = 49
sunt 

7 si -7

49 si -49

7 si 49

nu are solutii reale

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Solutiile reale ale ecuatiei

 x2x^2  = 5
sunt:

 5 \sqrt{5\ }  si  5-\sqrt{5}  

-5 si 5

25 si -25

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Solutiile reale ale ecuatiei

 x2+3=12x^2+3=12  sunt

-3 si 3

12 si -12

 12\sqrt{12}  si  12-\sqrt{12}  

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Solutiile reale ale ecuatiei

 x21=24x^2-1=24  
sunt:

-5 si 5

 24\sqrt{24}  si  24-\sqrt{24}  

 23\sqrt{23}  si  23-\sqrt{23}  

 5\sqrt{5}  si  5-\sqrt{5}  

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Solutiile reale ale ecuatiei

 x2÷2 =18x^2\div2\ =18  
sunt:

-6 si 6

-18 si 18

 18\sqrt{18}  si  18-\sqrt{18}  

 6-\sqrt{6}  si  6\sqrt{6}  

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Solutiile reale ale ecuatiei

 x2=18x^2=18  
sunt:

 x1 =32x_{1\ =}3\sqrt{2}  si  x2 =32x_{2_{\ }}=-3\sqrt{2}  

 x1=18x_1=18  si  x2=18x_2=-18  

 x1=9x_1=9  si  x2=9x_2=-9  

 x1=6x_1=6  si x2=6x_2=-6  

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Solutiile reale ale ecuatiei

 x2 : 2+7=9x^2\ :\ 2+7=9  

-3 si 3

-9 si 9

2 si -2

7 si -7

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