tgallen tgallen
  • 15-03-2019
  • Mathematics
contestada

For what values of x is the following expression a real​ number?
[tex]\sqrt{x} -4[/tex]

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Аноним Аноним
  • 15-03-2019

The square root is defined only for non-negative numbers. In other words, you can compute [tex] \sqrt{x} [/tex] if and only if [tex] x \geq 0 [/tex]

If [tex] x \geq 0 [/tex], the square root is a real number, and so is [tex] \sqrt{x}-4 [/tex]

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