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redudant +/-?
I want to make sure our article won't mislead some teen studying for the SAT. --[[User:Ed Poor|Ed Poor]] 13:03, 24 April 2007 (EDT)
I want to make sure our article won't mislead some teen studying for the SAT. --[[User:Ed Poor|Ed Poor]] 13:03, 24 April 2007 (EDT)
== redudant +/-? ==
There is no need for a +/- on both sides. Having it on one side is sufficient, since the "other" verion of the equation can be obtained by multiplying by -1.
<math>\sqrt{9} = \pm 3</math>
and
<math>-\sqrt{9} = \pm 3</math>
are equivalent.
I don't know why people keep inserting the +/- on the left side? [[User:Human|Human]] 14:48, 24 April 2007 (EDT)