Plus-Minus. Means a quantity of same magnitude can have either a positive or a negative value. As commonly found in square roots such as

$$\sqrt[2]{625}= +-25$$.

Here is an Wikipedia SVG-example of a basic trigonometry formula:

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How to render it using MathJax?

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ALSO;

Also I've seen use of minus-plus, i.e. .

I can't remember specific example but it was probably in some chemistry related text, in a situation; two variables (say $x$ and $y$) each have positive and negative value. But if $x$ is positive then $y$ is negative, and if $x$ is negative then $y$ is positive.

Don't know whether the second one is standard or not; but if the second-one is standard or allowed in MathJax; how to use it in MathJax formatting??

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PS. I've gone through MathJax basic tutorial and quick reference and also seen Google but could not find.

## marked as duplicate by quid♦, Community♦May 21 '17 at 12:54

• \pm and \mp – Daniel Fischer May 21 '17 at 12:39
• Great. You should publish it as answer and I'm accepting it. – Always Confused May 21 '17 at 12:40
• @DanielFischer: Sorry didn't see your comment before I posted my answer – Thomas May 21 '17 at 12:41
• It is in the tutorial, point 12. – quid May 21 '17 at 12:48
• @quid Can't find there. Mentioned in PostScript. – Always Confused May 21 '17 at 12:51
• Accepted as duplicate "that solved my purpose". But It is quite hard to find there. it has been also mixed up with division sign. – Always Confused May 21 '17 at 12:56
• It's alright you asked the question. I agree it's not that easy to find there. I still feel it should be closed as dupe for systematic reasons. Down the road your Q will still serve as useful sign-post for future user having had the same problem. – quid May 21 '17 at 13:05
• Detextify is helpful for this and similar questions. – Clarinetist May 22 '17 at 12:48

You can use $$\pm$$ or $$\mp$$ That is