Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 11 - Section 11.3 - Solving Equations by Using Quadratic Methods - Exercise Set - Page 788: 46

Answer

$x=12$

Work Step by Step

$x-\sqrt {3x}=6$ $x-\sqrt {3x}-6=6-6$ $x-\sqrt {3x}-6+\sqrt {3x}=0+\sqrt {3x}$ $x-6=\sqrt {3x}$ $(x-6)^2=(\sqrt {3x})^2$ $x*x+x(-6)+x(-6)+(-6)(-6)=3x$ $x^2-12x+36=3x$ $x^2-15x+36=0$ $(x-3)(x-12)=0$ $x-3=0$ $x=3$ $x-12=0$ $x=12$ $x-\sqrt {3x}=6$ $3-\sqrt {3*3}=6$ $3-3=6$ (false)
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