A positive number has two square roots, its principal (positive) root and its negative root. This is because a negative number multiplied by a negative number equals a positive number. In this instance, the square roots of 256 are 16 and -16.
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256 has two square roots: 16 and -16.
There are no real square roots of -256. But using complex numbers the square roots of -256 are 16i and -16i.
√0.0256 = ± 0.16 The two square roots are 0.16 and -0.16.
The two square roots of the number, '169', are +13 and -13 .
The two square roots are -22 and +22.