Dividing Complex Numbers Explained

Dividing Complex Numbers Explained

Assessment

Interactive Video

Mathematics

8th - 12th Grade

Practice Problem

Hard

CCSS
HSN.CN.A.3, HSN.CN.A.1, HSN.CN.A.2

Standards-aligned

Created by

Amelia Wright

FREE Resource

Standards-aligned

CCSS.HSN.CN.A.3
,
CCSS.HSN.CN.A.1
,
CCSS.HSN.CN.A.2

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the initial problem presented in the video?

Multiplying two complex numbers

Dividing two complex numbers

Adding two complex numbers

Subtracting two complex numbers

Tags

CCSS.HSN.CN.A.2

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of using the complex conjugate in the division of complex numbers?

To make the numerator a real number

To make the denominator a real number

To simplify the numerator

To simplify the entire expression

Tags

CCSS.HSN.CN.A.3

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the complex conjugate of (7 - 5i)?

5 - 7i

7 - 5i

7 + 5i

5 + 7i

Tags

CCSS.HSN.CN.A.3

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the result of multiplying (6 + 3i) by (7 + 5i) in the numerator?

42 + 51i - 15

42 + 30i + 21i - 15

42 + 30i + 21i + 15

42 + 51i + 15

Tags

CCSS.HSN.CN.A.2

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the value of (i^2) used in the simplification?

i

-1

1

0

Tags

CCSS.HSN.CN.A.1

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the simplified form of the denominator after using the FOIL method?

49 + 25i

49 - 25i

49 + 25

49 - 25

Tags

CCSS.HSN.CN.A.1

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the final real part of the simplified numerator?

27

42

15

51

Tags

CCSS.HSN.CN.A.3

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