Quiz about Complex Number Mixed Review

Question 1

Simplify the complex number: $$(3 + 4i) + (2 - 5i)$$ .

Accepted Answer

$$5 - i$$

Answer

$$1 + 9i$$

Answer

$$5 - 9i$$

Question 2

Simplify the complex number: $$(6 - 3i) - (4 + 2i)$$ .

Accepted Answer

$$2 - 5i$$

Answer

$$10 - 5i$$

Answer

$$2 + 5i$$

Answer

$$10 + 5i$$

Question 3

Simplify the complex number: $$(5 + 6i) - (3 + 2i)$$ .

Accepted Answer

$$2 + 4i$$

Answer

$$8 + 4i$$

Answer

$$2 - 4i$$

Answer

$$8 - 4i$$

Question 4

Simplify:
(10+ 15i)-(48 - 30i)

Accepted Answer

-38 + 45i

Answer

58 - 45i

Answer

58 - 15i

Answer

-38 - 15i

Question 5

Question 5.

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 6

Question 6.

Accepted Answer

-12i

Answer

12i

Answer

-12

Answer

12

Question 7

Question 7.

Accepted Answer

9i

Answer

9

Answer

-9

Answer

-9i

Question 8

Question 8.

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 9

Lisa wants to buy two new dresses from the mall. If one dress costs (59 - 6i) and the other costs (34 + 17i), how much money will she need to bring to the mall?

Accepted Answer

93 + 11i dollars

Answer

82 dollars

Answer

93 - 23i dollars

Answer

25 - 23i dollars

Question 10

i79

Accepted Answer

-i

Answer

i

Answer

1

Answer

-1

Question 11

Given $$i$$ is the imaginary unit, $$\left(2-yi\right)^2$$ in simplest form is

Accepted Answer

$$-y^2-4yi+4$$

Answer

$$y^2-4yi+4$$

Answer

$$-y^2+4$$

Answer

$$y^2+4$$

Question 12

Simplify.

Accepted Answer

5i

Answer

-5i

Answer

5

Answer

-5

Question 13

Simplify:
(7 + 2i)(9 - 6i)

Accepted Answer

75-24i

Answer

63 - 24i - 12i²

Answer

51 - 24i

Answer

58 + 60i

Question 14

Question 14.

Accepted Answer

A.

Answer

B.

Answer

C.

Answer

D.

Question 15

What letter usually represent imaginary number?

Accepted Answer

i

Answer

a

Answer

j

Answer

x

Question 16

i13

Accepted Answer

i

Answer

-1

Answer

1

Answer

-i

Question 17

i7

Accepted Answer

-i

Answer

i

Answer

1

Answer

-1

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