Quiz about 7.2 HW - Complex Numbers

Question 1

(5-2i) + (-7+8i)

Accepted Answer

-2+6i

Answer

12+6i

Answer

-35-16i2

Answer

-35 -16i

Question 2

(2i)(3i)

Accepted Answer

-6

Answer

5i

Answer

-5

Answer

6i

Question 3

Question 3.

Accepted Answer

B

Answer

A

Answer

C

Answer

D

Question 4

Find the product
(1+3i)(2-i)

Accepted Answer

5+5i

Answer

5-5i

Answer

2-3i

Answer

5+7i

Question 5

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

Accepted Answer

-38 + 45i

Answer

58 - 45i

Answer

58 - 15i

Answer

-38 - 15i

Question 6

How do you write a complex number?

Accepted Answer

a+bi

Answer

a-bi

Answer

ai+b

Answer

ai-b

Question 7

(-7+6i)2

Accepted Answer

13-84i

Answer

49+36i

Answer

85

Answer

13+84i

Question 8

4+5i+6+6i

Accepted Answer

10+11i

Answer

21i

Answer

20i+36

Answer

24+30i

Question 9

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

Accepted Answer

-38 + 45i

Answer

58 - 45i

Answer

58 - 15i

Answer

-38 - 15i

Question 10

Find the sum.
(5-2i) + (-7+8i)

Accepted Answer

-2+6i

Answer

12+6i

Answer

-35-16i2

Answer

-35 -16i

Question 11

A complex number can be expressed as a + bi. What does a represent?

Accepted Answer

the real part of the complex number

Answer

the imaginary part of the complex number

Answer

depends on the sign of the number

Answer

the square root of the complex number

Question 12

The complex conjugate can be found by...

Accepted Answer

Changing the sign of b

Answer

Changing the sign of both a and b

Answer

Changing the sign of a

Answer

Switching the a and b values

Question 13

If you are adding two complex numbers you should

Accepted Answer

add only the real numbers together and then add only the complex numbers together then stop

Answer

add all the numbers together then divide by 2

Answer

add only the real numbers and subtract the complex numbers

Answer

add only the complex numbers and subtract the real numbers

Question 14

Simplify (11 + 5i)(11 - 5i)

Accepted Answer

146

Answer

121 -110i

Answer

121 + 110i

Answer

121 - 25i²

Question 15

Simplify i³⁷

Accepted Answer

i

Answer

1

Answer

-i

Answer

-1

Question 16

Simplify i²⁴

Accepted Answer

1

Answer

i

Answer

-1

Answer

-i

Question 17

Simplify i⁴³

Accepted Answer

-i

Answer

1

Answer

i

Answer

-1

7.2 HW - Complex Numbers

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