5 0 0 A = | 0 1 0 3 1 3.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.2: Exponents And Radicals
Problem 44E
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Orthogonally diagonalize the matrices by finding an orthogonal matrix Q and a diagonal matrix D such that QT AQ = D.

5 0 0
A = | 0 1
0 3
1
3.
Transcribed Image Text:5 0 0 A = | 0 1 0 3 1 3.
Expert Solution
Step 1

Given,

Algebra homework question answer, step 1, image 1

Step 2

To find eigen values,

Algebra homework question answer, step 2, image 1

set det(A-λI) = 0

Algebra homework question answer, step 2, image 2

It gives eigen values -2, 4, and 5.

Step 3

To find eigenvector corresponding to eigen value -2

Algebra homework question answer, step 3, image 1

5x = -2x shows that x = 0 is the solution.

From second and third equations,

Algebra homework question answer, step 3, image 2

Thus, x = 0, z = y 

Algebra homework question answer, step 3, image 3

Step 4

To find eigenvector corresponding to eigen value -4

Algebra homework question answer, step 4, image 1

5x = 4x shows that x = 0 is the solution.

From second and third equations,

y +3z = 4y

3z =3y

z=y

3y + z = 4z

3y  = 3z

Thus, x =0, and  z = y, z =y

Algebra homework question answer, step 4, image 2

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