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Test radicali VII

Authored by Angela Sarghe

Mathematics

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Test radicali VII
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10 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Patratele perfecte cuprinse intre 20 și 90 sunt:

25, 36, 49, 64, 81

36, 49, 64, 81,90

49, 36, 54, 81,25

36, 64, 81, 100,25

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Rădacina patrată a numarului 225 este

25

15

152

2 ×\times 5

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Rezultatul calculului  32+42\sqrt{3^2+4^2}  este

49

25

5

-5

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Rezultatul calculului  64+25+169100144+121\sqrt{64}+\sqrt{25}+\sqrt{169}-\sqrt{100}-\sqrt{144}+\sqrt{121}   este

 135\sqrt{135}  

15

-4

 3153\sqrt{15}  

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Daca  x2=81 \sqrt{x^2}=81\   atunci vaxoarea lui x este

 929^2  

9

81

3

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt


 (15)2 este\sqrt{\left(-15\right)^2\ }este  

 15-15  

225

-225

+15

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Introducand factori sub radical  45-4\sqrt{5}  obținem

 20-\sqrt{20}  

 +80+\sqrt{80}  

 80-\sqrt{80}  

 +20+\sqrt{20}  

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