7.0710678, -7.0710678
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+7.071 and -7.071
√49 < √50 < √64 7 < √50 < 8 (we are talking about the principal square roots)
√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 .