Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Question
How do I solve the first image? I do not understand the absolute value step of solving this question |A|. I don't know what it does, or why we do it. Please explain it to me. To illustrate what I mean I have sent you another image portraying the absolute value step...
Thank you :)

Transcribed Image Text:Step 1: Calculate |A|
|1 0 0
|A| = |3 3
15 2 -1
13 3
5 21
= 1(-3 – 0) + 0 + 0 = -3
Since |A| # 0,A-1exists

Transcribed Image Text:Find the inverse of the given matrix, if it exists.
1 - 2
1
A = 5 -9
4
2 - 5
3.
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