Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 7 - Section 7.6 - Radical Equations and Problem Solving - Graphing Calculator Explorations: 4

Answer

$16-8\sqrt 7x +7x$

Work Step by Step

$(4-\sqrt 7x)(4-\sqrt 7x)$ Original problem FOIL $(4)(4)+(4)(-\sqrt 7x)+(4)(-\sqrt 7x)+(-\sqrt 7x)(-\sqrt 7x)$ Or $16-4\sqrt 7x-4\sqrt 7x+7x$ Combine like terms $16-8\sqrt 7x +7x$
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