Why isn't the square root of a number such as $\sqrt 9 = \pm3$?
7463
Square root of a square
82462
Square Root Algorithm
60261
Is $\sqrt{x^2}=|x|$ or $=x$? Isn't $(x^2)^\frac12=x?$
105110
Why does $\sqrt{n\sqrt{n\sqrt{n \ldots}}} = n$?
104917
Is $\sqrt1+\sqrt2+\dots+\sqrt n$ ever an integer?
41204
Why do I get one extra wrong solution when solving $2-x=-\sqrt{x}$?
95449
What is the square root of "$i$"?
40683
What's wrong with the square root version of the Klein-Gordon equation?
28228
Is a prime factor of a number always less than its square root?
23301
There does not exist any integer $m$ such that $3n^2+3n+7=m^3$
17930
Please explain this step in proving the square root of 3 is irrational
24301
Can a finite sum of square roots be an integer?
157868
Is it wrong to say $ \sqrt{x} \times \sqrt{x} =\pm x,\forall x \in \mathbb{R}$?
2899
Calculating a SQRT digit-by-digit?
128575
Elementary proof that $3$ is a primitive root of a Fermat prime?
17542
Why is $\sqrt{-x}*\sqrt{-x}=-x?$
112319
Sieve of Eratosthenes : why $\sqrt n$ work?