# LaTeX help

Rhapsody83
I'm new here and have never used LaTeX before, so excuse my ignorance. I looked up how to include equations in a post and found this link. I cannot get equations to render when clicking preview. I tried copying and pasting this: $$x = \frac {-b \pm \sqrt{b^2 -4ac}} {2a},$$ but it stays as raw code when I click preview. Can somebody please tell me what I'm doing wrong?

Rhapsody83
As you can see it rendered correctly when I posted. Not sure why it did not when I clicked preview as the link I gave said it would?

Mentor
PF uses "lazy rendering" to speed up the initial post. You need to refresh once to get it to render. Welcome to PF!

mcastillo356
Rhapsody83
Thanks for replying. Now time to go and do some research on how to use LaTeX and to make my first actual post.

berkeman
Gold Member
2022 Award
PF uses "lazy rendering" to speed up the initial post. You need to refresh once to get it to render.
This needs to be mentioned somewhere in the help section. Or a banner can be shown when creating threads stating whether the MathJax resource has been loaded. Any new user (or the unaware) will be fooled otherwise.

The following are threads that have been posted on this issue in this year:
Not many, but I believe new users can face some trouble. Regular users, who seldom post new threads compared to replying to threads, may also forget and be bewildered. Not complaining or ranting, but I believe a banner stating whether the MathJax resource has been loaded will be helpful when creating new threads.