it is 5
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Other than the perfect squares (1, 4, 9, 16) the square roots are irrational and given rounded to 4 dp:
√1 = 1
√2 ≈ 1.4142
√3 ≈ 1.7321
√4 = 2
√5 ≈ 2.2361
√6 ≈ 2.4495
√7 ≈ 2.6458
√8 ≈ 2.8284
√9 = 3
√10 ≈ 3.1623
√11 ≈ 3.3166
√12 ≈ 3.4641
√13 ≈ 3.6056
√14 ≈ 3.7417
√15 ≈ 3.8730
√16 = 4
√17 ≈ 4.1231
√18 ≈ 4.2426
√19 ≈ 4.3589
√20 ≈ 4.4721
The two square roots of 400 are: 20 and -20.
20. * * * * * Sort of. ± 20 are the square roots (not rout!) of 400.
-20 20
The numbers 1 and negative 1 (-1) are both square roots of positive 1.The square root of negative 1 is the "imaginary" number i.
Yes for example the square root of 1/4 is 1/2