How it is calculated
ⁿ√x = x^(1/n)Simplifying a square root: take out the largest perfect square factor: √72 = √(36 × 2) = 6√2.
Worked example
√72 ≈ 8.4853 = 6√2, and ∛125 = 5.
Frequently asked questions
Do negative numbers have square roots?
Not among real numbers; odd roots of negatives exist (∛−8 = −2).
What is a perfect square?
A number whose root is an integer: 1, 4, 9, 16, 25…
What about powers?
The calculator also shows the square and cube.