SpeedyGonzalez SpeedyGonzalez
  • 12-06-2017
  • Mathematics
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Simplify the rational expression. Find all numbers that must be excluded from the domain of the simplified rational expression.

Simplify the rational expression Find all numbers that must be excluded from the domain of the simplified rational expression class=

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mreijepatmat
mreijepatmat mreijepatmat
  • 12-06-2017
N/D =(x²+4x+4)/(x² - 4)

N= x²+4x+4 = (x+2)²
D = x²-4       =(x-2)(x+2)

N/D = (x+2)²/(x-2)(x+2); simplify by (x+2)

N/D = (x+2)/(x-2)

Domain of x ={x∈R≠3} ; in short x =( -2) should be excluded
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