Question

\[decide whether or \not the radical espression represents a real number? \sqrt{16}\]

Answer 1

yes = 4?

Answer 2

no this is +/- 4

Answer 3

No. The solutions of \( x^2 = 16 \) are \( x = \pm 4 \).

But in real analysis, the unique value of the expression \( \sqrt{16} \) is \( 4\).