If you solve a from I, should prove II does not have real root,
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• Wrong way is always as wrong reason. -jinjing- ♀ (152 bytes) () 07/15/2011 postreply 15:21:12
• Wrong way is always as wrong reason. -jinjing- ♀ (152 bytes) () 07/15/2011 postreply 15:21:12