document.write( "Question 30507: When I try to graph or solve for (x)^(1/3) or other odd roots, I get a complex number when x is negative. I know that (-2)^3 = -8, so why isn't (-8)^1/3 =-2? I am trying to learn how to do the basics on a TI-89 T.
\n" ); document.write( "Thanks, Bruce \n" ); document.write( "

Algebra.Com's Answer #17151 by Earlsdon(6294) $\"\"$ $\"About$

You can put this solution on YOUR website!
But it is!\r
\n" ); document.write( "\n" ); document.write( " $\"%28-8%29%5E%281%2F3%29+=+-2\"$ and if you were to cube both sides:
\n" ); document.write( " $\"%28%28-8%29%5E%281%2F3%29%29%5E3+=+%28-2%29%5E3\"$ = $\"-8\"$ \r
\n" ); document.write( "\n" ); document.write( "On both the TI-86 and the TI-89 Titanium, I get:
\n" ); document.write( " $\"%28-8%29%5E%281%2F3%29+=+-2\"$ \n" ); document.write( "

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