Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 7 - Test - Page 561: 16

Answer

$\frac{x^2 + 2x + 35}{(x + 2)(x + 9)(x - 5)}$

Work Step by Step

$\frac{x + 2}{x^2 + 11x + 18}$ + $\frac{5}{x^2 - 3x - 10}$ = $\frac{x + 2}{(x + 2)(x + 9)}$ + $\frac{5}{(x - 5)(x + 2)}$ = $\frac{(x + 2)(x - 5)}{(x + 2)(x + 9)(x - 5)}$ + $\frac{5(x + 9)}{(x - 5)(x + 2)(x + 9)}$ = $\frac{(x + 2)(x - 5) + 5(x + 9)}{(x + 2)(x + 9)(x - 5)}$ = $\frac{x^2 + 2x - 5x -10 + 5x + 45}{(x + 2)(x + 9)(x - 5)}$ = $\frac{x^2 + 2x + 35}{(x + 2)(x + 9)(x - 5)}$
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