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April 24, 2007
→Two square roots for each number: tried to make plus or minus convention clearer
+189
→Two square roots for each number: putting +/- notation back in, discuss on talk before reverting, please.
+84
April 22, 2007
→Two square roots for each number: allowing for both when solving
+272
no edit summary
-186
rv this edit: "(square root function is single-valued)" replacing +/- symbolism
+186
square root function is single-valued
-186