Square Root Calculator › Square root of 84
Square Root of 84
√84 ≈ 9.165151
84 is not a perfect square, so √84 is an irrational number that is approximately 9.165151. In simplified radical form, √84 = 2√21.
√84 lies between √81 = 9 and √100 = 10.
| Number | 84 |
| Square root (decimal) | 9.165151 |
| Simplified radical | 2√21 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 84 a perfect square?
No, 84 is not a perfect square, so its square root is irrational and approximately 9.165151.
What is the square root of 84 in simplest radical form?
√84 = 2√21 in simplest radical form.