document.write( "Question 970970: what are the x-intercept of this equation \"2x^3+15x^2+36x+9=0\" \n" ); document.write( "

Algebra.Com's Answer #593599 by Theo(13342) $\"\"$ $\"About$

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i was only able to find the x-intercept by graphing.
\n" ); document.write( "this expression does not have rational roots so the rational roots test failed.
\n" ); document.write( "all other tests failed.
\n" ); document.write( "i tried 2 online factoring calculators and they couldn't factor it.
\n" ); document.write( "those calculator can be found at:
\n" ); document.write( "http://www.tiger-algebra.com/
\n" ); document.write( "http://www.mathportal.org/calculators/polynomials-solvers/polynomial-factoring-calculator.php
\n" ); document.write( "the only other recourse was to graph it and see where the zero crossing are.
\n" ); document.write( "the x-intercept is at x = .2828575.
\n" ); document.write( "there is only one x-intercept.
\n" ); document.write( "the equation was not able to be factored in any of the usual ways.
\n" ); document.write( "the graphing solution is shown below:
\n" ); document.write( " $\"$$$\"$
\n" ); document.write( "the answer shown there is rounded.
\n" ); document.write( "i was able to get more decimal places using my TI-84 Plus graphing calculator. \n" ); document.write( "

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