document.write( "Question 1054336: For all real values of x, f(x^2) + f(30-x)=6x-4. Determine the value of f(25). \n" ); document.write( "

Algebra.Com's Answer #669548 by ikleyn(52814) $\"\"$ $\"About$

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\n" ); document.write( "For all real values of x, f(x^2) + f(30-x)=6x-4. Determine the value of f(25).
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document.write( "Apply the given equality  = \r\n" );
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document.write( "to x = 5. You will get then\r\n" );
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document.write( "f(25) + f(30-5) = 6*5-4,   or\r\n" );
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document.write( "f(25) + f(25) = 26,   or\r\n" );
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document.write( "2*f(25) = 26,   which gives  f(25) =  = 13.\r\n" );
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document.write( "Answer.  f(25) = 13.\r\n" );
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