document.write( "Question 194479: I need help multiplying this rational expression. x+9/x-3 * x^3-27/x^2+3x+9 \n" ); document.write( "
Algebra.Com's Answer #145916 by jim_thompson5910(35256)\"\" \"About 
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\n" ); document.write( "\"%28%28x%2B9%29%2F%28x-3%29%29%28%28x%5E3-27%29%2F%28x%5E2%2B3x%2B9%29%29\" Start with the given expression.\r
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\n" ); document.write( "\n" ); document.write( " Factor \"x%5E3-27\" to get \"%28x-3%29%2A%28x%5E2%2B3%2Ax%2B9%29\". Note: use the difference of cubes formula.\r
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\n" ); document.write( "\n" ); document.write( "\"%28%28x%2B9%29%28x-3%29%28x%5E2%2B3x%2B9%29%29%2F%28%28x-3%29%28x%5E2%2B3x%2B9%29%29\" Combine the fractions. \r
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\n" ); document.write( "\n" ); document.write( " Highlight the common terms. \r
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\n" ); document.write( "\n" ); document.write( " Cancel out the common terms. \r
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\n" ); document.write( "\n" ); document.write( "\"x%2B9\" Simplify. \r
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\n" ); document.write( "\n" ); document.write( "So \"%28%28x%2B9%29%2F%28x-3%29%29%28%28x%5E3-27%29%2F%28x%5E2%2B3x%2B9%29%29\" simplifies to \"x%2B9\".\r
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\n" ); document.write( "\n" ); document.write( "In other words, \"%28%28x%2B9%29%2F%28x-3%29%29%28%28x%5E3-27%29%2F%28x%5E2%2B3x%2B9%29%29=x%2B9\" where \"x%3C%3E3\"
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