document.write( "Question 1199942: Find the domain of f(x) = (x-3)/(x^2-3x-4) \n" ); document.write( "

Algebra.Com's Answer #833927 by ikleyn(53765) $\"\"$ $\"About$

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document.write( "The denominator is  x^2-3x-4.\r\n" );
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document.write( "Factor it to identify its roots  x^2-3x-4 = (x-4)*(x+1).\r\n" );
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document.write( "Now you see that the roots are 4 and -1.\r\n" );
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document.write( "Hence, the domain is the set of all real numbers except of -1 and 4 \r\n" );
document.write( "(because division by zero is PROHIBITED).\r\n" );
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document.write( "ANSWER.  The domain is the set of all real numbers except of -1 and 4.\r\n" );
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