Question

What is 169 = s to the second power

Answer 1

`169 = s^(2)`

Square-rooting on both sides, we get,

`√(169 ) = (+-)\sqrt{ s^(2) }`


`√(13*13 ) = (+-)\sqrt{ s^(2) }`


`\sqrt{ 13^(2) } =(+-)\sqrt{ s^(2) }`

Since, the square cancels out square- square root sign, we have


`13 = (+-)s`


`(+-)s = 13`

So, when "s" is positive, the value of "s" is 13
and when "s" is negative, the value of "s" is -13

So, the values of "s" are 13 , -13

Answer 2

`s^2=169\iff s=-13\ or\ s=13\\\\because:\\\\(-13)^2=169\ and\ 13^2=169`