they are similar because squared root is the number multiply by its self to get the answer. and the squared number is the answer to the problem's u multiplied my its self.
3*3=9 3*3 is the square...
There are two possible values of sqrt(3). For want of the necessary symbols, let us call them +x and -x
Then sqrt(3) - sqrt(3) is one of -2*x, 0, and 2*x