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laneya1 laneya1
  • 19-08-2016
  • Mathematics
Answered

how to find excluded values ?

how to find excluded values ? class=

Verified Answer :

caylus
caylus caylus
  • 19-08-2016

Hello,

The method is to find the roots of the denominator.

x²-2x-15=x²+3x-5x-15=x(x+3)-5(x+3)=(x+3)(x-5)

Roots are x=-3 and x=5

Answer C

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