19 is the more simple answer but -19 is also a sqrt
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The two square roots of 361 are +19 and -19 . Are those on the list of choices that you neglected to include with the question ?
√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 .
The two square roots are -22 and +22.