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 is the square root of 800?

A: The square root of 800 is 28.2842712475, which, when rounded off to four significant figures, equals 28.28. It is a decimal number, which shows that 800 is... 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 46?

A: The square root of 46 is 6.78. The square root of a number can be expressed by the formula x times x equals y, where y is the square of x. Plugging in 46 t... Full Answer >Filed Under: -
Q:
## What is the cube root of 81?

A: The cube root of 81 is 2.51. The cube root of the variable y is equal to the variable x such that when x is twice multiplied by itself the product is y, as... Full Answer >Filed Under: