document.write( "Question 284109: Im having trouble understanding this one could you explain how to get the answer please?:\r
\n" ); document.write( "\n" ); document.write( "A rectangle has area of x^2+3x-18 and width x-3 find the factor for the length
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Algebra.Com's Answer #206164 by oberobic(2304)\"\" \"About 
You can put this solution on YOUR website!
\"A+=+area+=+Length++%2A+Width\"
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\n" ); document.write( "\"A+=+x%5E2+%2B+3x+-18\"
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\n" ); document.write( "\"W+=+width+=+x-3\"
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\n" ); document.write( "Since
\n" ); document.write( "\"A+=+L%2AW\"
\n" ); document.write( "We can rearrange to say that
\n" ); document.write( "\"A%2FW+=+L\",
\n" ); document.write( "which suggests you divide A/W (that is, polynomial division).
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\n" ); document.write( "But you may be able to factor the equation to advantage.
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\n" ); document.write( "\"x%5E2+%2B+3x+-18+=+%28x%2B6%29%28x-3%29\"
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\n" ); document.write( "So substituting what we know
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\n" ); document.write( "\"A+=+L+%2A+W\"
\n" ); document.write( "\"A+=+%28x%2B6%29+%2A+W\"
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\n" ); document.write( "Which means
\n" ); document.write( "\"L+=+%28x%2B6%29\"
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\n" ); document.write( "Done
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