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 - Practice - Page 782: 2

Answer

$x=\frac{1+\sqrt {13}}{2},\frac{1-\sqrt {13}}{2}$

Work Step by Step

$\frac{2x}{x-1} - \frac{x+2}{x} = \frac{5}{x(x-1)}$ $x*(x-1)*\frac{2x}{x-1} - x*(x-1)*\frac{x+2}{x} = x*(x-1)*\frac{5}{x(x-1)}$ $x*2x-(x-1)(x+2)=5$ $2x^2-(x*x+x*2+x(-1)+2*(-1))=5$ $2x^2-(x^2+2x-x-2)=5$ $2x^2-x^2-2x+x+2=5$ $x^2-x+2=5$ $x^2-x-3=0$ $x=(-b±\sqrt{b^2-4ac})/2a$ $x=(-(-1)±\sqrt{(-1)^2-4*1*(-3)})/2*1$ $x=(1±\sqrt{1+12})/2$ $x=(1±\sqrt{13})/2$ Neither solution of $x$ will make the denominator negative.
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