15 and -15
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+15 and -15.
√0.0256 = ± 0.16 The two square roots are 0.16 and -0.16.
256 has two square roots: 16 and -16.
The two square roots of the number, '169', are +13 and -13 .
Because some of them are squares of rational numbers. So their square roots are the rational numbers.Thus if x is rational, then the square roots of x2, which are -x and +x are both rational.