Answer
$S=6x^2$.
Work Step by Step
The surface area of a cube is $S$.
The length of one side is $x$ units.
$6$ times the square of the length of a side is $6x^2$.
Thus, the surface area $S$ is $S=6x^2$.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Appendix A - Review - A.1 Algebra Essentials - A.1 Assess Your Understanding - Page A13: 140
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