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 324?

A: The square root of 324 is 18. The square root of a number can also be a negative number because the square of a negative number is always a positive number... Full Answer >Filed Under: -
Q:
## What are some tricks for calculating square roots?

A: To estimate a square root without a calculator, determine the two perfect squares that come before and after the given number. Then using the square roots ... Full Answer >Filed Under: -
Q:
## What is the square root of 325?

A: The square root of 325 is 18.0277563773. This answer is derived by multiplying 18.0277563773 by 18.0277563773 which is equal to 325. Full Answer >Filed Under: -
Q:
## What is the square root of 6?

A: The square root of 6, calculated to 11 digits to the right of the decimal point, is 2.44948974278. Because the calculation does not produce a whole number,... Full Answer >Filed Under: