document.write( "Question 627648: Use f(x)=-2x^2+5x-3/x^2-1 to determine the domain of f(x)
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Algebra.Com's Answer #395030 by solver91311(24713) $\"\"$ $\"About$

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\n" ); document.write( "\n" ); document.write( "The domain of a function is the set of values of the independent variable for which the function is defined. A rational function with integer exponents is defined for all real values of the independent variable except for those values that cause the denominator to evaluate to zero.\r
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\n" ); document.write( "\n" ); document.write( "Set the denominator polynomial equal to zero and solve. In this case you have a quadratic denominator that is not a perfect square but does have real number zeros*, so you will find two real values,

and

that must be excluded from your domain. Hence,\r
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\n" ); document.write( "\n" ); document.write( "All you need to do is replace the two values once you have determined what they are.\r
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\n" ); document.write( "\n" ); document.write( "*Note: Any quadratic equation of the form

where the

and

coefficients have opposite signs is guaranteed to have two distinct real roots.\r
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\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "My calculator said it, I believe it, that settles it
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$\"The$

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