Answer
LCD=3$x^{2}$(x+5)(x-5)
Work Step by Step
$\frac{5}{x^{2}-25}$, $\frac{x+9}{3x^{3}-15x^{2}}$
$x^{2}$-25=$x^{2}$-$5^{2}$=(x+5)(x-5)
3$x^{3}$-15$x^{2}$=3$x^{2}$(x-5)
LCD=3$x^{2}$(x+5)(x-5)
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 7.3 - Adding and Subtracting Rational Expressions with the Same Denominator and Least Common Denominator - Exercise Set - Page 508: 34
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