# Chapter 11 - Rational Expressions and Functions - 11-4 Adding and Subtracting Rational Expressions - Practice and Problem-Solving Exercises - Page 675: 24

$k(k^2 - 2)$

#### Work Step by Step

To find the LCD, or the Least Common Multiple,we must write out each denominator as products of prime factors. $k = k$ $k^2 - 2 = (k^2 - 2)$ Since there are no common factors between the denominators, the LCD, or LCM, then is $k(k^2 - 2)$

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