Q:
# What is the square root of 81?

**The square root of 81 is 9. ** However, if a student needs to solve the equation Â x^{2} = 81, then possible solutions can be either +9 or -9.

Because 81 is a perfect square, it is easy to find its square root. However, finding the square root of a number that is not a perfect square is more difficult. For example, the square root of 72 is 6 x √2. To find this answer, factor 72 into 2 x 36, all placed under the √ symbol, then factor out again as 2 x 6 x 6 (still under the √ symbol). As 36 is a perfect square, the 6s can be moved outside the √, resulting in the answer of 6√2.

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Q:
## What is the square root of 72?

A: The square root of 72 is approximately 8.49 when rounded to the nearest hundredth. Since it is not a perfect square, it can most easily be solved by using ... Full Answer >Filed Under: -
Q:
## How do you find square roots?

A: To calculate the square root of any number, estimate by using the closest perfect square, and divide the number for which you want the square root by the r... Full Answer >Filed Under: -
Q:
## What is the square root of 27?

A: The square root of 27 is 5.19615242271. The number 27 is not a perfect square, so it does not have an exact square root. Numbers such as 36, 49 and 121 are... Full Answer >Filed Under: -
Q:
## What is the square root of 11?

A: The numerical value of the square root of 11 is approximately 3.317, although the exact number has many more decimal places. Because 11 is a prime number, ... Full Answer >Filed Under: