Determine whether each expression is meaningful as a real number.
Is \(-\sqrt{9}\) meaningful as a real number? Yes or No?
Answer (2)
Y es − 9 i s re a l n u mb er − 9 = − 3 i s in t e g er n u mb er − a ∈ R f or an y a ≥ 0
-\sqrt{9} is meaningful as a real number because it evaluates to -3, which is a real number and an integer. The square root of 9 is defined as 3, and adding the negative sign gives us -3. Therefore, the answer is Yes.
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