Question 1

What is a square root?

Accepted Answer

A square root of a number is a value that, when multiplied by itself, gives the original number. For example, the square root of 9 is 3, because 3 × 3 = 9.

Question 2

What is a cube root?

Accepted Answer

A cube root of a number is a value that, when multiplied by itself three times, gives the original number. For example, the cube root of 27 is 3, because 3 × 3 × 3 = 27.

Question 3

What is the root of a negative number?

Accepted Answer

You can find the real cube root of a negative number (e.g., the cube root of -8 is -2). However, the square root of a negative number is an 'imaginary number,' which this calculator indicates with the symbol 'i'.

Question 4

What is a 'perfect square'?

Accepted Answer

A perfect square is an integer that is the square of another integer. For example, 4, 9, and 16 are perfect squares because they are 2², 3², and 4², respectively. Their square roots are whole numbers.

Square/Cube Root Calculator