# Question regarding the square root of a squared number. [duplicate]

I've learnt that the square root of a number squared is equal to the absolute value of that number, but I haven't really understood why. I have looked through other questions on MSE but didn't really find a good answer.

As an example: for me there are two ways to arrive at a solution for $\sqrt{(-5)^2}$

First: $\sqrt{(-5)^2}=$ $\sqrt{25}=5$