Free Printable Numere complexe

1.

$\sqrt{-25}$

a)

25

b)

5

c)

25i

d)

5i

2.

$\left(3i\right)^2$

a)

9

b)

-9

c)

3

d)

-3

3.

$\left(-5i\right)^2$

a)

5

b)

25

c)

-5

d)

-25

4.

dacă $z=5+2i$ atunci $\overline{z}=$

a)

$\sqrt{29}$

b)

$-5+2i$

c)

$5-2i$

d)

29

5.

dacă $z=5+2i$ atunci $z\cdot\overline{z}=$

a)

$\sqrt{29}$

b)

$21$

c)

$5-2i$

d)

29

6.

$\left(6-2i\right)\cdot\left(6+2i\right)=$ Calculați

a)

40

b)

36

c)

32

d)

4

7.

Calculați

\left(5+3i\right)^2

a)

34

b)

$25+9i$

c)

$2+6i$

d)

$16+30i$

8.

$\left|4+3i\right|$ Aflați

a)

25

b)

5

c)

17

d)

$\sqrt{17}$

9.

$i^3=$

a)

$i$

b)

$-i$

c)

1

d)

-1

10.

$i^{2020}$

a)

$i$

b)

$-i$

c)

1

d)

$-1$

e)

- 2020

Numere complexe

Total questions: 10

Worksheet time: 3mins

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