sreeparnatalukdar sreeparnatalukdar
  • 24-06-2017
  • Mathematics
contestada

x^2-16>0 range of x?


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mathmate
mathmate mathmate
  • 25-06-2017
Assuming "range" is used in the normal Englsih sense, and not the mathematical meaning for the possible value of a function.

If we limit ourselves to real numbers, then
-4<=x<=4 for x^2-16>0

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ghanami
ghanami ghanami
  • 25-06-2017
hello : 
x²-16 >0   ...   x² >16
√x² > √16       but : √16 = 4  and √x² = |x | 
conclusion : 
|x | > 4 
the range is : x < 4  or x >  4
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