Matematică – operații elementare cu nr. reprezentate prin litere

20 bonus points

26 successes

English

Acest test verifică dacă elevul știe să adune, scadă, înmulțească, împartă sau să ridice la putere numerele reale reprezentate prin litere.

The Crazy Squirrel throw with hypnotic small to make you not like reading and learning. Hold your breath for 2 seconds and defeat her in this fight!

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Question 1 of 10

1. Question
1 points
$4 x - 9 x^{2} + 5 x^{2} - 7 x =$
- $- 4 x^{2} + 3 x$
- $- 11 x + 14 x^{2}$
- $- 4 x^{2} - 3 x$
- $- 11 x - 14 x^{2}$
Correct

Incorrect
Question 2 of 10

2. Question
1 points
$3 \sqrt{5} x - 7 \sqrt{2} - 2 \sqrt{2} - 8 \sqrt{5} x =$
- $- 9 \sqrt{2} x - 5 \sqrt{5}$
- $- 5 \sqrt{5} x - 9 \sqrt{2}$
- $- 11 \sqrt{5} x - 5 \sqrt{2}$
- Niciuna din variante
Correct

Incorrect
Question 3 of 10

3. Question
1 points
Efectuați: ${(\frac{2}{3} x^{2})}^{2} =$
- $\frac{2}{3} x^{4}$
- $\frac{4}{6} x^{4}$
- $\frac{4}{3} x^{2}$
- $\frac{4 x^{4}}{9}$
Correct

Incorrect
Question 4 of 10

4. Question
1 points
Cubul dublului numărului ${(2 x)}^{2}$ este egal cu:
- $256 x^{2}$
- ${(12 x)}^{2}$
- $12 x^{6}$
- $512 x^{6}$
Correct

Incorrect
Question 5 of 10

5. Question
1 points
$(21 x^{7}) \div (- 3 x^{4}) =$
- $- 7 x^{3}$
- $18 x^{3}$
- $7 x^{3}$
- $- 18 x^{3}$
Correct

Incorrect
Question 6 of 10

6. Question
1 points
${(- \sqrt{5} x^{3})}^{4} + {(- 2 x^{6})}^{2} =$
- $28 x^{12}$
- $(- \sqrt{5} - 2) x^{12}$
- $29 x^{12}$
- $(\sqrt{5} - 2) x^{19}$
Correct

Incorrect
Question 7 of 10

7. Question
1 points
$(\frac{1}{4} x^{3}) \times (8 x^{4}) =$
- $\frac{8 x^{12}}{4}$
- 12
- $2 x^{7}$
- $12 x^{7}$
Correct

Incorrect
Question 8 of 10

8. Question
1 points
$(- \frac{15}{2} x^{5}) \div (\frac{3}{8} x^{2}) =$
- $- 20 x^{3}$
- $20 x^{7}$
- Niciuna din variante
- $20 x^{3}$
Correct

Incorrect
Question 9 of 10

9. Question
1 points
$7 x^{3} - (3 x) \times (2 x^{2}) =$
- $x^{4}$
- $8 x^{4}$
- $x^{3}$
- $8 x^{3}$
Correct

Incorrect
Question 10 of 10

10. Question
1 points
$(12 x^{5} + 6 x^{4}) \div (- 6 x^{4}) =$
- $- 2 x - 1$
- $0$
- $12 x^{5} - 1$
- $2 x - 1$
Correct

Incorrect