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The square roots of some numbers are rational:

eg sqrt(4) = 2, sqrt(0.04) = 0.2, sqrt(400) = 20

The square roots of some numbers are irrational

eg sqrt(2) = 1.414 (approx), sqrt(0.02) = 0.1414 (approx), sqrt(200) = 14.14 (approx)

The square roots of negative numbers are neither rational nor irrational, but imaginary.

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Q: Is square root rational or irrational?

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