Performing Operations with Complex Numbers

Question 1

Which property of addition is shown below? 3 + 4i + 5 + 6i = 3 + 5 + 4i + 6i

Revolt · Accepted Answer

commutative property

Question 2

What is the additive inverse of the complex number 13 – 2i?

Revolt · Accepted Answer

–13 + 2i

Question 3

Helene is finding the sum (9 + 10i) + (–8 + 11i). She rewrites the sum as (–8 + 11)i + (9 + 10)i. Which statement explains the property of addition that she made an error in using?

Revolt · Accepted Answer

Helene incorrectly used the distributive property by combining the real number and the coefficient of the imaginary part.

Question 4

What is the multiplicative identity of the complex number –4 + 8i?

Revolt · Accepted Answer

1

Question 5

Daine simplified the expression below. 8(1 + 2i) – (7 – 3i) = 1 + 5iWhat mistake did Daine make?

Revolt · Accepted Answer

He did not apply the distributive property correctly for 8(1 + 2i).

Question 6

Which equation is an example of the commutative property of multiplication?

Revolt · Accepted Answer

(8 + 6i)(7 – 9i) = (7 – 9i)(8 + 6i)

Question 7

What is the value of the product (4 – 2i)(6 + 2i)?

Revolt · Accepted Answer

28 – 4i

Question 8

What is the sum of 15 – 6i and –2 + 9i?

Revolt · Accepted Answer

13 + 3i

Question 9

What is the value of ?

Revolt · Accepted Answer

3 + 3i

Question 10

Which expression is equivalent to ?

Revolt · Accepted Answer

4i – 2

Performing Operations with Complex Numbers Answers

More from this Course

TRY EDGENUITY HACKS