find the square root of 81 : 81.
The square root of 81 is 9.
To find the square root of 81, you can use a calculator or use the fact that the square root of a number x is a number y that, when multiplied by itself, gives x.
In this case, the square root of 81 would be a number y such that y * y = 81.
If you calculate it using a calculator, you will find that the square root of 81 is 9.
If you do not have a calculator, you can also find the square root of 81 by using prime factorization.
To find the prime factorization of 81, we can start by dividing it by 3, which gives us 3 * 3 * 3.
Now, we can pair the factors in groups of 2, which means we have one pair of 3s.
Since we have one pair of 3s, we know that the square root of 81 is equal to 3.
To find the square root of 81, you can follow these steps:
Step 1: Start with the number you want to find the square root of, which in this case is 81.
Step 2: Take a guess at the square root. A good initial guess is usually the number that when squared, is closest to 81. In this case, that number is 9, because 9 * 9 = 81.
Step 3: Divide the number you want to find the square root of (81) by your initial guess (9). This gives you 81 / 9 = 9.
Step 4: Take the average of your initial guess (9) and the result of the division (9). The average is (9 + 9) / 2 = 9.
Step 5: Use this new average (9) as your new guess and repeat steps 3 and 4 until you have an answer that is accurate enough for your needs.
In this case, the square root of 81 is 9.