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Evaluare semestrul I_8

Authored by Sabareanu Lucian-Alexandru

Mathematics

8th Grade

Used 18+ times

Evaluare semestrul I_8
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9 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Rezultatul calculului

 (2x3y)2\left(2x-3y\right)^2  este:

 4x12xy+9y4x-12xy+9y  

 4x26xy+9y24x^2-6xy+9y^2  

 4x2+12xy+9y24x^2+12xy+9y^2  

 4x212xy+9y24x^2-12xy+9y^2  

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Rezultatul calculului

 (5322)(53+22)\left(5\sqrt{3}-2\sqrt{2}\right)\left(5\sqrt{3}+2\sqrt{2}\right)  este:

11

67

71

83

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Soluțiile ecuației

 x25x+6x^2-5x+6  sunt:

-3 și -2

2 și 3

5 și 6

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Rezultatul calculului

 (x+2)2x29:x24(x+3)2\frac{\left(x+2\right)^2}{x^2-9}:\frac{x^2-4}{\left(x+3\right)^2}  este:

 11  

 (x+2)(x+3)(x2)(x3)\frac{\left(x+2\right)\left(x+3\right)}{\left(x-2\right)\left(x-3\right)}  

 (x+2)(x3)(x2)(x+3)\frac{\left(x+2\right)\left(x-3\right)}{\left(x-2\right)\left(x+3\right)}  

5.

FILL IN THE BLANK QUESTION

1 min • 1 pt

Numărul de muchii ale unui tetraedru regulat este:

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Fie cubul ABCDEFGH. Unghiul dintre AE și BC este:

45°45^{\degree}

0°0^{\degree}

90°90^{\degree}

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Fie cubul ABCDEFGH cu AB=12. Distanța de la G la AB este:

12

12212\sqrt{2}

12312\sqrt{3}

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