Linear Algebra: A= 7 2 2 4 Need to find P (orthogonal matrix) and D (diagonal matrix) such that A=P*D*PT, PT is transpose matrix of P.
Linear Algebra: A= 7 2 2 4 Need to find P (orthogonal matrix) and D (diagonal matrix) such that A=P*D*PT, PT is transpose matrix of P.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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A=
7 | 2 |
2 | 4 |
Need to find P (orthogonal matrix) and D (diagonal matrix) such that A=P*D*PT, PT is transpose matrix of P.
Found out that D is:
3 | 0 |
0 | 8 |
the matrix P I calculated was:
2/rad(5) | 1/rad(5) |
-1/rad(5) | 2/rad(5) |
But the answer for P was the 2s and 1s switched. I am not sure where I made a mistake, please help. My work is shown attached.
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