# Chapter 6 - Section 6.2 - One-to-One Functions; Inverse Functions - 6.2 Assess Your Understanding: 3

$(-\infty, +\infty); x \ne -6, 3$

#### Work Step by Step

In order to find when the function given exists, we have to find when it is undefined. Thus, we see when the bottom of the fraction is equal to 0: $$x^2 +3x -18 = 0 \\ (x+6)(x-3)=0 \\ x=-6, 3$$ Thus, the domain is: $(-\infty, +\infty); x \ne -6, 3$

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