Determine if the given square root evaluates to a real number.
$-\sqrt{4}$

• A. Real
• B. Not Real
• C. Cannot be determined.

Answer: (A)

Verified step by step guidance

1. Identify the expression given: \(-\sqrt{4}\). This means the negative of the square root of 4.
2. Recall that the square root function \(\sqrt{x}\) returns the principal (non-negative) square root of \(x\) when \(x\) is non-negative.
3. Calculate \(\sqrt{4}\), which is the number that when squared gives 4. Since \(2^2 = 4\), \(\sqrt{4} = 2\).
4. Apply the negative sign outside the square root: \(-\sqrt{4} = -2\).
5. Since \(-2\) is a real number, conclude that the expression evaluates to a real number.