document.write( "Question 363806: x^2/3 - x^1/3 - 20 = 0 \n" ); document.write( "

Algebra.Com's Answer #259452 by robertb(5830) $\"\"$ $\"About$

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$\"x%5E%282%2F3%29+-+x%5E%281%2F3%29+-+20+=+0\"$ ,
\n" ); document.write( " $\"%28x%5E%281%2F3%29-5%29%28x%5E%281%2F3%29%2B4%29+=+0\"$ ,
\n" ); document.write( " $\"x%5E%281%2F3%29-5=+0\"$ or $\"x%5E%281%2F3%29%2B4+=+0\"$ . Thus $\"x+=+5%5E3+=+125\"$ , or $\"x+=+%28-4%29%5E3+=+-64\"$ .
\n" ); document.write( "To check:
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, and
\n" ); document.write( " $\"%28125%29%5E%282%2F3%29-%28125%29%5E%281%2F3%29+-+20+=+5%5E2+-+5-20+=+25-5-20+=+0\"$ . \n" ); document.write( "

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