Answer
Since $A$ is the zero matrix, $x_1, x_2$, and $x_3$ are all free variables. Thus, the solution set is all vectors in $\mathbb{R}^3$.
Work Step by Step
Answer contains full explanation; see answer above.
Linear Algebra and Its Applications (5th Edition)
by Lay, David C.; Lay, Steven R.; McDonald, Judi J.
Published by
Pearson
ISBN 10:
032198238X
ISBN 13:
978-0-32198-238-4
Chapter 1 - Linear Equations in Linear Algebra - 1.5 Exercises - Page 49: 27
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