document.write( "Question 979535: 49t^(2/3)+28^(1/3)=-4 \n" ); document.write( "

Algebra.Com's Answer #600859 by Fombitz(32388) $\"\"$ $\"About$

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Substitute.
\n" ); document.write( "Let $\"u=t%5E%281%2F3%29\"$
\n" ); document.write( "Then,
\n" ); document.write( " $\"49u%5E2%2B28u%2B4=0\"$
\n" ); document.write( " $\"%287u%2B2%29%5E2=0\"$
\n" ); document.write( " $\"7u%2B2=0\"$
\n" ); document.write( " $\"7u=-2\"$
\n" ); document.write( " $\"u=-2%2F7\"$
\n" ); document.write( " $\"t%5E%281%2F3%29=-2%2F7\"$
\n" ); document.write( " $\"t=%28-2%2F7%29%5E3\"$
\n" ); document.write( " $\"t=-8%2F343\"$ \n" ); document.write( "

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