# LaTeX instructions

To use $\LaTeX$ on this blog, you first use a dollar sign and “latex” like this:

$latex x = \frac{ - b \pm \sqrt{b^2 - 4 a c} }{2 a} then you can close it with another dollar sign: $.

Putting it all together, the renderer will give you:

$x = \frac{ - b \pm \sqrt{b^2 - 4 a c} }{2 a}$

Basically, it’s like writing latex, except that every time you have to go into math mode, you have to type “latex” right after the first dollar sign.

## 4 thoughts on “LaTeX instructions”

1. Now, if only wordpress can make it so the images have a transparent background instead of a white background. They use PNGs for the images, so there really is no excuse on their part.

2. Yeah, it looks pretty atrocious in RSS readers without a white background. I had some problems with transparency in PNGs due to cross-platform issues (creating the transparency on a Mac wouldn’t read in Windows), so maybe they’re “playing it safe?” That was a few years ago, though….

3. foobar says:

$x = x$.

4. foobar says:

wow, it works 😀

$\frac{1}{n-1}\sum{(X_i-\overline{X})^2} = \frac{1}{n-1}(\sum{X_i^2}-n\overline{X}^2) = \frac{n}{n-1}(M_2-\overline{X}^2)$.

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