lizardman25
lizardman25 lizardman25
  • 22-02-2018
  • Mathematics
contestada

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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