If $x=9$, then can we write $\sqrt{x}=\pm3$ or only $\sqrt{x}=3$
3955
Square roots -- positive and negative
7966
How prove $ \sqrt{2}+\sqrt{3}>\pi$?
85287
Prove that, for $p > 3$, $(\frac 3p) = 1$ when $p \equiv 1,11 \pmod{12}$ and $(\frac 3p) = -1$ when $p \equiv 5,7 \pmod{12}$
146512
Prove that for every prime number $p>3$, $4p^2+1$ can be written as the sum of three square numbers
34491
Is there a way to show that $\sqrt{p_{n}} < n$?
148876
What is the meaning of $\mathbf{Q}(\sqrt{2},\sqrt{3})$
75705
Finding derivative of $\sqrt[3]{x}$ using only limits
44307
Prove $\sqrt[3]{3} \notin \mathbb{Q}(\sqrt[3]{2})$
34227
Continued fraction of a square root
16420
When does $\sqrt{wz}=\sqrt{w}\sqrt{z}$?
108429
Show that if $x_n \to x$ then $\sqrt{x_n} \to \sqrt{x}$
43084
Find the limit. (If an answer does not exist, enter DNE.) $\lim _{x→∞} (\sqrt{9x^2 + x} − 3x)$
129171
Prove that $1+\frac{1}{3}+\frac{1\cdot 3}{3\cdot 6}+\frac{1\cdot 3\cdot 5}{3\cdot 6 \cdot 9}+.........=\sqrt{3}$
109953
How to prove that $\sqrt 3$ is an irrational number?
23830
Proof that if $p\equiv3\,\left(\mbox{mod 4}\right)$ then $p$ can't be written as a sum of two squares
83910
Integer part of $\sqrt[3]{24+\sqrt[3]{24+\sqrt[3]{24+\cdots}}}$
26461
Integer solutions of $x^3-x+9=5y^2$