document.write( "Question 353245: -9x1/4 + x1/2 +20=0\r
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Algebra.Com's Answer #252417 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"-9%2Aroot%284%2Cx%29+%2B+sqrt%28x%29+%2B20=0\"$
\n" ); document.write( "Let $\"u=root%284%2Cx%29\"$ , $\"u%5E2=sqrt%28x%29\"$
\n" ); document.write( " $\"u%5E2-9u%2B20=0\"$
\n" ); document.write( " $\"%28u-4%29%28u-5%29=0\"$
\n" ); document.write( "Two solutions,
\n" ); document.write( " $\"u-4=0\"$
\n" ); document.write( " $\"u=4\"$
\n" ); document.write( " $\"highlight%28x=4%5E4=256%29\"$
\n" ); document.write( ".
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\n" ); document.write( " $\"u-5=0\"$
\n" ); document.write( " $\"u=5\"$
\n" ); document.write( " $\"highlight%28x=5%5E4=625%29\"$
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