Answer
Expression is undefined when
x=7 or x=-2
Work Step by Step
Expression is undefined when
$x^{2}$-5x-14=0
$x^{2}$+2x-7x-14=0
x(x+2)-7(x+2)=0
(x-7)(x+2)=0
x-7=0 or x+2=0
x=7 or x=-2
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 7 - Section 7.1 - Simplifying Rational Expressions - Exercise Set - Page 490: 20
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