lizardman25 lizardman25

22-02-2018
Mathematics

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Answer Check!! Which domain restrictions apply to the rational expression.

Answer Check Which domain restrictions apply to the rational expression class=

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jimthompson5910 jimthompson5910

22-02-2018

You are correct.

x^2+2x-3 = 0
(x-1)(x+3) = 0
x-1=0 or x+3 = 0
x = 1 or x = -3
If x = 1 or x = -3, then the denominator is zero.
To avoid division by zero errors, we kick x = 1 and x = -3 out of the domain

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