document.write( "Question 918125: how do i solve f{x) = 0, find the value of x? i am just starting algebra and having a hard time with it. \n" ); document.write( "

Algebra.Com's Answer #556913 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
It really depends on what f(x) is.
\n" ); document.write( "You can graph it and look for where it crosses the x-axis but that's an approximate method and may require a lot of iterations to window in on a solution.
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\n" ); document.write( "Some functions allow for simple algebraic solutions, such as,
\n" ); document.write( " $\"f%28x%29=x%2B1\"$
\n" ); document.write( "So,
\n" ); document.write( " $\"f%28x%29=0\"$
\n" ); document.write( " $\"x%2B1=0\"$
\n" ); document.write( " $\"x=-1\"$
\n" ); document.write( "So, $\"f%28-1%29=0\"$
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\n" ); document.write( "Others are not so easy and require numerical methods to solve.
\n" ); document.write( " $\"f%28x%29=x%5E2e%5E%28-2x%29+-xe%5E%28-2x%29+-6\"$ being a recent example.
\n" ); document.write( "Solve using numerical methods, where approximately,
\n" ); document.write( " $\"x=-0.75508\"$
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\n" ); document.write( "But you really need to know f(x) to know which way to proceed.\r
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