Concept Check Which of the following rational expressions is equivalent to $-1 ?$ In choices $\mathrm{A}, \mathrm{B}$, and $\mathrm{D}, x \neq-4$, and in choice $\mathrm{C}, x \neq 4 .$ (Hint: There may be more than one answer.)A. $\frac{x-4}{x+4}$B. $\frac{-x-4}{x+4}$C. $\frac{x-4}{4-x}$D. $\frac{x-4}{-x-4}$

College Algebra
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ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
ChapterP: Prerequisites
Section: Chapter Questions
Problem 14CC
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Concept Check Which of the following rational expressions is equivalent to $-1 ?$ In choices $\mathrm{A}, \mathrm{B}$, and $\mathrm{D}, x \neq-4$, and in choice $\mathrm{C}, x \neq 4 .$ (Hint: There may be more than one answer.)
A. $\frac{x-4}{x+4}$
B. $\frac{-x-4}{x+4}$
C. $\frac{x-4}{4-x}$
D. $\frac{x-4}{-x-4}$

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