document.write( "Question 172557: I need to find the domain of this function if you can help
\n" ); document.write( "f(x)=x^2-81/x^2-8x+15
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Algebra.Com's Answer #127426 by Mathtut(3670)\"\" \"About 
You can put this solution on YOUR website!
x is undefined if \"x%5E2-8x%2B15\"=zero
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\n" ); document.write( "\"x%5E2-8x%2B15=0\"
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\n" ); document.write( "\"%28x-3%29%28x-5%29=0\"\r
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\n" ); document.write( "\n" ); document.write( "the domain is all real numbers excluding \"system%28x=3%2Cx=5%29\"
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