document.write( "Question 21815: Need assistance please with applications using rational equatins and proportions. thanks for your help\r
\n" ); document.write( "\n" ); document.write( "Find all numbers for which the rational expression is not defined.\r
\n" ); document.write( "\n" ); document.write( "3/x\r
\n" ); document.write( "\n" ); document.write( "4/x-6\r
\n" ); document.write( "\n" ); document.write( "x+5/x^2-36\r
\n" ); document.write( "\n" ); document.write( "x2-3x+2/x^2+x-30
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Algebra.Com's Answer #11718 by rapaljer(4671)\"\" \"About 
You can put this solution on YOUR website!
Denominators can NEVER equal zero. Therefore, the following values are NOT allowed, because they would make the denominators equal to zero.\r
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\n" ); document.write( "\n" ); document.write( "\"3%2Fx+\"
\n" ); document.write( "x cannot equal zero!\r
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\n" ); document.write( "\n" ); document.write( "\"4%2F%28x-6%29+\"
\n" ); document.write( "x cannot equal 6, because that value of x makes the denominator zero. NOT allowed!\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"%28x%2B5%29%2F%28x%5E2-36%29\"
\n" ); document.write( "Factor the denominator:
\n" ); document.write( " \"%28x%2B5%29%2F%28%28x-6%29%28x%2B6%29%29\"
\n" ); document.write( "x cannot equal either +6 or =6!\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"+%28x2-3x%2B2%29%2F%28x%5E2%2Bx-30%29\"\r
\n" ); document.write( "\n" ); document.write( "Factor the numerator and denominator:
\n" ); document.write( "\"+%28%28x-2%29%28x-1%29%29%2F%28%28x%2B6%29%28x-5%29%29\"
\n" ); document.write( "x cannot equal -6 or +5, since these values make denominators zero. \r
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\n" ); document.write( "\n" ); document.write( "R^2 at SCC
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