simplify. enter the answer in the box. \n$\\sqrt{81}=\\square$
simplify. enter the answer in the box. \n$\\sqrt{81}=\\square$
Answer
Explanation:
Step1: Recall the definition of square root
The square root of a number (x), denoted as (\sqrt{x}), is a number (y) such that (y\times y = x).
Step2: Find the number whose square is 81
We know that (9\times9=81) and ((- 9)\times(-9) = 81). But by the principal square root definition (for (\sqrt{x}) where (x\geq0), we take the non - negative root), when we consider (\sqrt{81}), we take (y = 9).
Answer:
(9)