Find the square root of 81: 81−−√.
The square root of 81 is 9.
To find the square root of 81 (√81), you can simplify the expression by recognizing that 81 is a perfect square. The square root of 81 is 9 because 9 x 9 = 81. So, the square root of 81 is 9.
To find the square root of 81, we can either use a calculator or try to find the answer manually. Since 81 is a perfect square, we can easily find the square root without a calculator.
To find the square root manually, we need to find the number that, when multiplied by itself, equals 81. We start by guessing a number, then check if the square of that number equals 81. If it's not, we adjust our guess and repeat the process until we find the correct square root.
Let's start by guessing a number. In this case, let's guess 9, because 9 squared is 81. So, 9 is our square root of 81.
The correct answer is 9.