Hi ZebreJaune!
First of all, it's important to know that a square root is the reverse of a power of 2!
Take as an example the number 5
What is the power of 2 of the number 5? we must do 5 * 5 = 25, then the power of 2 of number 5 is 25
The square root is the reverse of the power of two : What is the square root of 25? In other words, which number multiplied by the same number gives 25? 5!
However, you must be careful, when making the square root of a number, it is important to always put a +/- before the answer. Indeed, 5 * 5 = 25, but -5 * -5 = 25 too! Hence the importance of +/-
Hoping to have answered your question :)!