document.write( "Question 357725: 2x^2/3-7x^1/3=4\r
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Algebra.Com's Answer #255452 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"2x%5E%282%2F3%29-7x%5E%281%2F3%29=4\"$
\n" ); document.write( "This is a quadratic equation in disguise.
\n" ); document.write( "Use a substitution, $\"u=x%5E%281%2F3%29\"$
\n" ); document.write( " $\"u%5E2=x%5E%282%2F3%29\"$
\n" ); document.write( " $\"2u%5E2-7u=4\"$
\n" ); document.write( " $\"2u%5E2-7u-4=0\"$
\n" ); document.write( " $\"%282u%2B1%29%28u-4%29=0\"$
\n" ); document.write( "Two solutions:
\n" ); document.write( " $\"2u%2B1=0\"$
\n" ); document.write( " $\"2u=-1\"$
\n" ); document.write( " $\"u=-1%2F2\"$
\n" ); document.write( " $\"x%5E%281%2F3%29=-1%2F2\"$
\n" ); document.write( " $\"highlight%28x=-1%2F8%29\"$
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\n" ); document.write( " $\"u-4=0\"$
\n" ); document.write( " $\"u=4\"$
\n" ); document.write( " $\"x%5E%281%2F3%29=4\"$
\n" ); document.write( " $\"highlight%28x=64%29\"$
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