Q:
# What is the square root of 324?

**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. The equation (-18) x (-18) = 324, therefore, the square root of 324 can also be (-18).

The square root of a number is determined by obtaining the factors of the number. The factors of 324 are 2 x 2 x 3 x 3 x 3 x 3; these factors can be simplified to show 2 x 3 x 3 squared, which is 18 x 18 = 324.

Similarly, the square root of 400 is either 20 or (-20). Numbers that are perfect squares have exact square roots. If a number is not a perfect square, its square root is a decimal fraction.

Learn more about Exponents-
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 61?

A: The square root of 61 is 7.81. A squared number means that number is multiplied by itself. The square root is the opposite. It indicates the number, when m... Full Answer >Filed Under: -
Q:
## What is the square root of 130?

A: The square root of 130 is 11.40, rounded to two decimal places. To find the square root using the Google search engine, simply type "sqrt(130)" into the Go... Full Answer >Filed Under: -
Q:
## What is the square root of 189?

A: The square root of 189 is equal to 3 times the square root of 21, or approximately 13.75. To simplify the square root of a number, the number must first be... Full Answer >Filed Under: