Answer
$2wx+ x^2$.
Work Step by Step
Surface area $=Height\cdot Length+Length\cdot Width+Width \cdot Height$.
Substitute all values.
$=x\cdot w+w\cdot x+x \cdot x$
Simplify.
$=wx+w x+ x^2$
$=2wx+ x^2$.
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 11 - Rational Expressions and Functions - 11-1 Simplifying Rational Expressions - Apply What You've Learned - Page 669: c
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