√ -169 = 13i
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The square root of 169 = ± 13
169. 13 x 13 = 169. square root of 169 = 13.
13, is not the square root of 156, but the best i can give you is that 13 is the square root of 169 and 14 is the square root of 196.
13x13=16913
169