# Different symbols for square roots

Why are the square root symbols on this post different? Some of them have vertical bar and other ones have slanted bars.

• I see no vertical bars... – gniourf_gniourf Jun 20 '13 at 19:11
• @gniourf_gniourf, I've just edited to insert a screen shot. – Sigur Jun 20 '13 at 19:18
• I don't have vertical bars where you have. Then MathJax does different stuff on different browsers/OS? – gniourf_gniourf Jun 20 '13 at 20:17
• I'm using Mozilla Firefox for Ubuntu, 18.0.1. – Sigur Jun 20 '13 at 20:29
• Ubuntu 12.04/Mozilla Firefox 21.0. – gniourf_gniourf Jun 20 '13 at 20:32

• I think that I understood. Since the first four have fractions with both numerator and denominator containing parenthesis with powers, they have the same height and it was necessary to use vertical expansible bars. On the fifth, it does not contain ()^2 on numerator. Interesting! Thanks. – Sigur Jun 20 '13 at 19:10