document.write( "Question 621084: what is the difference between f and fx\r
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Algebra.Com's Answer #390562 by vleith(2983)\"\" \"About 
You can put this solution on YOUR website!
sometimes they mean the same thing.
\n" ); document.write( "Sometimes someone will use f as the function, and f(x) to mean a specific point on that function.
\n" ); document.write( "But most times, they mean the same thing.
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\n" ); document.write( "f = x^2 + 4x + 9 is the same as
\n" ); document.write( "f(x) = x^2 + 4x + 9
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