Why is $(\sqrt{x^2})$ equal to $|x|$
111432
Square root of a number squared is equal to the absolute value of that number
100995
For what $x$ : $2\sqrt{x}+\dfrac{1}{\sqrt{x+1}} \leq 2\sqrt{x+1}$
106911
Square root of $-1$ in the ring $\mathbb{R}[x]/\langle(x^2+1)^2\rangle$
7463
Square root of a square
138193
Why is $\sqrt {12} = 2 \sqrt 3$?
141945
Why is $f(x) = \sqrt{x}$ is continuous at $x=0$? Does $\lim_{x \to 0^{-}} \sqrt{x}$ exist?
70660
Why is $\sqrt{8}/2$ equal to $\sqrt{2}$?
17707
Why is ${x^{\frac{1}{2}}}$ the same as $\sqrt x $?
155136
$x\in \{\{\{x\}\}\}$ or not?
3390
finding the real values of $x$ such that : $x=\sqrt{2+\sqrt{2-\sqrt{2+x}}}$
127830
proof that $\sqrt(2)$ is irrational / why is the fraction irreducible
143122
Showing that the square root is monotone
133496
is $\sqrt{x}$ always positive?
73099
Why is $d(x^2)= 2xdx$?
114346
Why is $a^{-1}$ mod $p$ equal to $a^{p-2}$ mod $p$?
67588
Why does $|e^{ix}|^2 = 1$?
42581
Simple algebra square root inequality