laneya1
laneya1
19-08-2016
Mathematics
contestada
how to find excluded values ?
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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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