Intermediate Algebra (6th Edition)

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

Chapter 6 - Section 6.4 - Dividing Polynomials: Long Division and Synthetic Division - Exercise Set - Page 371: 91

Answer

$\dfrac{f(x)}{g(x)}=7x^3+14x^2+25x+50+\dfrac{102}{x-2}$; $x=2$ is not in the domain.

Work Step by Step

With the given functions, $f(x)= 7x^4-3x^2+2 ,$ and $g(x)= x-2 ,$ using the long division below, then \begin{array}{l}\require{cancel} \dfrac{f(x)}{g(x)} =\dfrac{ 7x^4-3x^2+2 }{ x-2 } \\\\\dfrac{f(x)}{g(x)}= 7x^3+14x^2+25x+50+\dfrac{102}{x-2} .\end{array} If $x= 2 ,$ then the denominator, $ g(x)=x-2 ,$ becomes zero. Since denominators cannot be zero, then $ x=2 $ is not in the domain of $\dfrac{f(x)}{g(x)}.$
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