Functional square root is a way to find the solution of an equation. It works by taking the "square root" of both sides of an equation. That means you divide both sides by the same number (the square root), which will make the equation "even out" and make it easier to solve. For example:
If you have the equation 3x+2=8, you can take the square root of both sides of the equation to get it to look like this:
√(3x+2) = √8
Now, you can divide both sides by the square root (√) which will make the equation look like this:
3x+2/√ = 8/√
Now, you can solve the equation like normal and get the answer. So in this case, the answer would be x=2.