document.write( "Question 180460: x^4-7x^3+18x-126=0 \n" ); document.write( "

Algebra.Com's Answer #135363 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+graph%28+300%2C+300%2C+-5%2C+10%2C+-10%2C+10%2C+x%5E4-7x%5E3%2B18x-126%29+\"$
\n" ); document.write( "Looks like x=7 is a root.
\n" ); document.write( " $\"7%5E4-7%287%29%5E3%2B18%287%29-126=0\"$
\n" ); document.write( " $\"126-126=0\"$
\n" ); document.write( "You can iterate to find another root is between x=-2 and x=-3 at about x=-2.62074.
\n" ); document.write( "We can do a long division to find the exact value.
\n" ); document.write( " $\"%28x%5E4-7x%5E3%2B18x-126%29%2F%28x-7%29=x%5E3%2B18\"$
\n" ); document.write( " $\"x%5E3=-18\"$
\n" ); document.write( " $\"x=-18%5E%281%2F3%29\"$
\n" ); document.write( "or approximately,
\n" ); document.write( " $\"x=-2.62074\"$
\n" ); document.write( "Is that what you were looking for?? \n" ); document.write( "

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