Square roots, cube roots, and nth roots are inverses of exponentiation. The square root of n is the number that when multiplied by itself gives n. Roots appear throughout geometry, physics, and statistics.
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Pro Tip
Perfect squares (1, 4, 9, 16, 25, 36…) have whole-number square roots. Everything else is irrational.
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Did You Know?
The square root of 2 was the first known irrational number, discovered by the ancient Greeks — legend says it led to a philosopher's execution for proving it.
References
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