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No. The square root of 84 is an irrational number
No because it is 2 times the square root of 21 which is an irrational numberThe square root of 84 is not a rational number
84 is not the square of an integer, its square root, rounded to five decimal places, is ±9.16515.
No. The sq root of 84 is 9.16555515139. 81 is a perfect square, where the sq root is 9.
The square roots of 84 are irrational.