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 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: -
Q:
## What is the square root of 54?

A: The principal (positive) square root of 54 is 7.35 to two decimal places. There is also a negative square root, which is -7.35 to two decimal places.... Full Answer >Filed Under: -
Q:
## How do you calculate a square root?

A: In order to calculate the square root of a non-perfect square number, first find two perfect squares between which the number lies. Second, divide the numb... Full Answer >Filed Under: -
Q:
## How do you find a number's square root?

A: Find the square root by finding the number that, when multiplied by itself, gives you the root number. For root numbers that are not perfect squares, there... Full Answer >Filed Under: