document.write( "Question 746038: Gostaria de calcular a função
\n" ); document.write( "f(x + 3) = x2 - 4 quanto vale f(f(5)).\r
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Algebra.Com's Answer #454111 by Edwin McCravy(20065)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "En primer lugar, encontramos f(5) sustituyendo 2 para x en:\r\n" );
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document.write( "f(x + 3) = x²-4\r\n" );
document.write( "f(2 + 3) = 2²-4\r\n" );
document.write( "    f(5) = 4-4\r\n" );
document.write( "    f(5) = 0\r\n" );
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document.write( "Luego f(f(5)) = f(0)\r\n" );
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document.write( "Entonces encontramos f(0) sustituyendo -3 para x en:\r\n" );
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document.write( " f(x + 3) = x²-4\r\n" );
document.write( "f(-3 + 3) = (-3)² - 4\r\n" );
document.write( "     f(0) = 9-4\r\n" );
document.write( "     f(0) = 5\r\n" );
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document.write( "Por lo tanto f(f(5)) = f(0) = 5\r\n" );
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document.write( "Edwin
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