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Polynomials Intro

0. Review of Algebra / Polynomials Intro / Problem 2

In the given rational expression, write all the numbers that make this expression undefined. Then simplify.
(x-1)/(x²-1)

A

x/(x+1); x ≠ -1, 1

B

1/(x-1); x ≠ 1

C

1/(x+1); x ≠ -1

D

1/(x+1); x ≠ -1, 1

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