Answer
$\frac{x+1}{3(x+2)}$
Work Step by Step
We simplify:
$\displaystyle \frac{4(x^{2}-1)}{12(x+2)(x-1)}=\frac{4(x+1)(x-1)}{12(x+2)(x-1)}=\frac{x+1}{3(x+2)}$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter P, Prerequisites - Section P.7 - Rational Expressions - P.7 Exercises - Page 51: 16
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