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Intermediate Algebra

OPENSTAX

$Math Studyset Vaia Explanations$ Math

OER 2017 Edition · 1346 pages

ISBN: 9780998625720

Chapter 11: Q. 569 (page 1069)

Multiply The complex Number : $(- 2 - 5 i) (- 4 + 3 i)$

Short Answer

Expert verified

The Solution is $23 + 14 i$

Step by step solution

Step 1. The Given Information

An expression is $(- 2 - 5 i) (- 4 + 3 i)$

Step 2. Multiplying The terms

$= (- 2) (- 4) + (- 2) (3 i) + (- 5 i) (- 4) + (- 5 i) (3 i) = 8 - 6 i + 20 i - 15 i^{2} = 8 + 14 i - 15 i^{2} = 23 + 14 i$

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Most popular questions from this chapter

Simplify each expression:

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Multiply The complex Number : $(- 2 - 5 i) (- 4 + 3 i)$

Short Answer

Step by step solution

Step 1. The Given Information

Step 2. Multiplying The terms

One App. One Place for Learning.

Most popular questions from this chapter

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Multiply The complex Number : (−2−5i)(−4+3i)

Short Answer

Step by step solution

Step 1. The Given Information

Step 2. Multiplying The terms

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Mechanics Maths

Decision Maths

Pure Maths

Geometry

Logic and Functions

Probability and Statistics

Study anywhere. Anytime. Across all devices.

Multiply The complex Number : $(- 2 - 5 i) (- 4 + 3 i)$