document.write( "Question 420033: Please help me find the real number solutions of this equation:
\n" ); document.write( "\"+18x%5E3=50x+\" \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Thank you!
\n" ); document.write( "

Algebra.Com's Answer #293602 by jsmallt9(3758)\"\" \"About 
You can put this solution on YOUR website!
\"18x%5E3=50x\"
\n" ); document.write( "In general, to solve equations where the variable has exponents larger than 1, you:
  • Get one side of the equation to be zero.
  • Factor the the other side.
  • Use the Zero Product Property.
  • Solve the equations from the Zero Product Property.

\n" ); document.write( "So we start by subtracting 50x from each side:
\n" ); document.write( "\"18x%5E3-50x+=+0\"
\n" ); document.write( "Now we factor. And factoring always starts with the Greatest Common Factor (GCF). The GCF is 2x:
\n" ); document.write( "\"2x%289x%5E2-25%29+=+0\"
\n" ); document.write( "The second factor is a difference of squares so it will factor according to the \"a%5E2-b%5E2+=+%28a%2Bb%29%28a-b%29\" pattern:
\n" ); document.write( "2x(3x+5)(3x-5) = 0
\n" ); document.write( "We are finished factoring. The Zero Product Property tells us this (or any) product can be zero only if one (or more) of the factors is zero. So:
\n" ); document.write( "2x = 0 or 3x+5 = 0 or 3x-5 = 0
\n" ); document.write( "Solving each of these we get:
\n" ); document.write( "x = 0 or x = -5/3 or x = 5/3
\n" ); document.write( "These are the three real solutions to your equation.

\n" ); document.write( "P.S. \"Exponential equations\" are equations where the variable is in the exponent. Your equation is what is called a \"Polynomial equation\". Posting your problems under the right category may result in faster responses from the tutors.
\n" ); document.write( "
\n" );