Answer
$|4-x|$
Work Step by Step
Factor the trinomial to have:
$=\sqrt{(4-x)^2}$
Taking the square root of a perfect square of a number gives us the absolute value of the original number:
$=|4-x|$
Calculus with Applications (10th Edition)
by Lial, Margaret L.; Greenwell, Raymond N.; Ritchey, Nathan P.
Published by
Pearson
ISBN 10:
0321749006
ISBN 13:
978-0-32174-900-0
Chapter R - Algebra Reference - R.7 Radicals - R.7 Exercises - Page R-29: 23
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