Answer
See below.
Work Step by Step
A good solution is $(A\cap B)\cup(A\cap C)$. This is the union of the intersections of $A$ and $B$ and $A$ and $C$, which is what we want.
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 2 - Set Theory - 2.4 Set Operations and Venn Diagrams with Three Sets - Exercise Set 2.4 - Page 93: 76
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