document.write( "Question 402234: I need to find what numbers cannot be used in place of th vaiable in this rational expression.\r
\n" ); document.write( "\n" ); document.write( "3x/x^2-49
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Algebra.Com's Answer #284603 by Earlsdon(6294)\"\" \"About 
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The value(s) of x that would make the denominator zero would be the \"excluded\" value(s).
\n" ); document.write( "\"3x%2F%28x%5E2-49%29\" Set the denominator equal to zero and solve for x.
\n" ); document.write( "\"x%5E2-49+=+0\" Factor.
\n" ); document.write( "\"%28x%2B7%29%28x-7%29+=+0\" so...
\n" ); document.write( "\"x+=+-7\" and \"x+=+7\" would be the excluded values.
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