document.write( "Question 310375: x^2/5 -x^1/5 -12=0
\n" ); document.write( "Solve by substitution \n" ); document.write( "

Algebra.Com's Answer #221909 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"u=x%5E%281%2F5%29\"$ , then $\"u%5E2=x%5E%282%2F5%29\"$ .
\n" ); document.write( " $\"u%5E2-u-12=0\"$
\n" ); document.write( " $\"%28u-4%29%28u%2B3%29=0\"$
\n" ); document.write( "Two solution:
\n" ); document.write( " $\"u-4=0\"$
\n" ); document.write( " $\"u=4\"$
\n" ); document.write( " $\"x%5E%281%2F5%29=4\"$
\n" ); document.write( " $\"x=4%5E5\"$
\n" ); document.write( " $\"highlight%28+x=1024%29\"$
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( " $\"u%2B3=0\"$
\n" ); document.write( " $\"u=-3\"$
\n" ); document.write( " $\"x%5E%281%2F5%29=-3\"$
\n" ); document.write( " $\"x=%28-3%29%5E5\"$
\n" ); document.write( " $\"highlight%28+x=-243%29\"$ \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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