root problem's


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root problem's



Hi there!

Does anybody know why (-x)^(2/3) is not the same as ( 3rd root of (-x)^2) on
the TI 85 and is the same (but wrong) on the TI 86 ?
The point is : why can you plott (and solve) root's of (-x) in real ?  I
thought it is only in comlex numbering system defined ???

/Thx Tom