Solving $\frac{\sqrt {x}}{2}=-1$, I get $x=4$. Where did I go wrong?
41204
Why do I get one extra wrong solution when solving $2-x=-\sqrt{x}$?
142401
Where's the problem in this equation? Resulting in $4 = 5$
59175
Given that $x+\frac{1}{x}=\sqrt{3}$, find $x^{18}+x^{24}$
31852
An elegant way to solve $\frac {\sqrt3 - 1}{\sin x} + \frac {\sqrt3 + 1}{\cos x} = 4\sqrt2 $
80710
Does $\int_{-1}^1 \frac 1 x dx$ equal zero?
57594
How to simplify $\frac{\sqrt{4+h}-2}{h}$
125069
Help with $\int \frac 1{\sqrt{a^2 - x^2}} \mathrm dx$
112709
$\frac{1}{x-a} + \frac{1}{x-b} + \frac{1}{x-c} = 0 $ has precisely two real roots
34762
Why isn't $\int \frac{1}{x}~dx = \frac{x^0}{0}$?
34227
Continued fraction of a square root
6482
Why aren't the functions $f(x) = \frac{x-1}{x-1}$ and $f(x) = 1$ the same?
72278
What is the value of $\frac{\sin x}x$ at $x=0$?
17707
Why is ${x^{\frac{1}{2}}}$ the same as $\sqrt x $?
30429
How to prove $\cos \frac{2\pi }{5}=\frac{-1+\sqrt{5}}{4}$?
29739
How can $\frac{x^3-4x^2+4x}{x^2-4}$ be both $0$ and "undefined" when $x = 2$?
134587
Solve $x\sqrt{x\sqrt{x\sqrt{x\dots}}} = 4$
143878
Solve: $\int x^3\sqrt{4-x^2}dx$