document.write( "Question 497535: find all numbers for which the rational expression is undefined. If the rationaal expression is defined for all numbers, state this.
\n" ); document.write( "y+3/y^2-9 \n" ); document.write( "
Algebra.Com's Answer #337429 by lwsshak3(11628)\"\" \"About 
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find all numbers for which the rational expression is undefined. If the rationaal expression is defined for all numbers, state this.
\n" ); document.write( "y+3/y^2-9
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\n" ); document.write( "y+3/y^2-9
\n" ); document.write( "To find the values of y that make the given rational expression undefined, set the denominator=0, then solve for y.
\n" ); document.write( "..
\n" ); document.write( "y^2-9=0
\n" ); document.write( "(y+3)(y-3)=0
\n" ); document.write( "y+3=0
\n" ); document.write( "y≠-3
\n" ); document.write( "and
\n" ); document.write( "y-3=0
\n" ); document.write( "y≠3
\n" ); document.write( "..
\n" ); document.write( "Domain: (-∞,-3) U (-3, 3) U (3, ∞) \n" ); document.write( "
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