For what values of x is the following expression a real number?

Question

2 years ago

13

TexFormula1" title="\sqrt{x} -4" alt="\sqrt{x} -4" align="absmiddle" class="latex-formula">

1 answer:

IrinaVladis [17] · Answer 1 · 2022-07-01T11:59:34+03:00

8 0

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

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

For what values of x is the following expression a real​ number?