Answer :
The square root of 169 is: √169 = √(13)^2 = √(13 × 13) = 13.
The square root of 169 is 13, i.e. √169 = 13. The radical representation of the square root of 169 is √169. Also, we know that the square of 13 is 169, i.e. 132 = 13 × 13 = 169. Thus, the square root of 169 can also be expressed as, √169 = √(13)^2 = √(13 × 13) = 13. Also, we can say that 169 is a perfect square. However, the square root of 169 is ±13. As we know, 13 × 13 = 169 and (-13) × (-13) = 169.
From this representation, we can say that the square root of 169 can be both positive and negative of 13. In general, “the square root” is often used to refer to the principal or non-negative square root. Hence, we write the positive number as the result unless it is specified as roots.
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