document.write( "Question 842839: find the domain of x sqrd/(x sqrd-9)
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Algebra.Com's Answer #507927 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
Use the caret to denote a power.
\n" ); document.write( "x^2= $\"x%5E2\"$
\n" ); document.write( "Look for values of $\"x\"$ when the denominator equals zero since division by zero is undefined.
\n" ); document.write( " $\"x%5E2-9=%28x%2B3%29%28x-3%29=0\"$
\n" ); document.write( "Two solutions:
\n" ); document.write( " $\"x%2B3=0\"$
\n" ); document.write( " $\"x=-3\"$
\n" ); document.write( "and
\n" ); document.write( " $\"x-3=0\"$
\n" ); document.write( " $\"x=3\"$
\n" ); document.write( "So then the domain is all values except x=3 and x=-3
\n" ); document.write( "( $\"-infinity\"$ , $\"-3\"$ )U( $\"-3\"$ , $\"3\"$ )U( $\"3\"$ , $\"infinity\"$ )
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