Answer
The domain is {$x|x\ne-1, x\ne2$}
Work Step by Step
Denominator cannot be $0$. Solve the denominator to find the value where $x=0$. Factor the polynomial in the denominator.
$x^{2}-x-2=0$
$(x+1)(x-2)=0$
$x=-1$ and $x=2$
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 1 - Section 1.4 - Rational Expressions - 1.4 Exercises - Page 42: 13
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