Answer
$2$.
Work Step by Step
First perform the computation in $\mathbb{Z}$:
$$(3+4)(3+2+4+2)=(7)(11)=77$$
To convert this to $\mathbb{Z}_5$, we must find the remainder of $77$ divided by $5$, which is $2$.
Linear Algebra: A Modern Introduction
by Poole, David
Published by
Cengage Learning
ISBN 10:
1285463242
ISBN 13:
978-1-28546-324-7
Chapter 1 - Vectors - 1.1 The Geometry and Algebra of Vectors - Exercises 1.1 - Page 17: 38
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