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How to write square root symbol in LaTex ?
$\sqrt{x}$
$$\sqrt{x}$$
produces the square root of x.
$\sqrt{\frac{a}{b}}$
$$\sqrt{\frac{a}{b}}$$
$\sqrt[3]{x}$
$$\sqrt[3]{x}$$
$\sqrt[n]{x}$
$$\sqrt[n]{x}$$
The roots of a quadratic polynomial $a x^2 + bx + c$ with
$a \neq 0$ are given by
$\frac{-b \pm \sqrt{b^2-4ac}}{2a} $
$$\frac{-b \pm \sqrt{b^2-4ac}}{2a} $$
The faster you move through space the slower you move through time
$t'=\frac{t}{\sqrt{1-\frac{v^2}{c^2}}}$
$$t’=\frac{t}{\sqrt{1-\frac{v^2}{c^2}}}$$