document.write( "Question 312422: Solve. What is the solution set?
\n" ); document.write( "(x+6)(x-4)(x+4)>0
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Algebra.Com's Answer #223417 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
Break up the number line into 4 regions,
\n" ); document.write( "Region \"1\": (\"-infinity\",\"-6\")
\n" ); document.write( "Region \"2\": (\"-6\",\"-4\")
\n" ); document.write( "Region \"3\": (\"-4\",\"4\")
\n" ); document.write( "Region \"4\": (\"4\",\"infinity\")
\n" ); document.write( "Pick a point in each region (not the endpoints) and test the inequality.
\n" ); document.write( "If the inequality is true, that region is part of the solution set.
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\n" ); document.write( ".
\n" ); document.write( "Region \"1\", let \"x=-10\"
\n" ); document.write( " \"+%28x%2B6%29%28x-4%29%28x%2B4%29%3E0\"
\n" ); document.write( " \"+%28-10%2B6%29%28-10-4%29%28-10%2B4%29%3E0\"
\n" ); document.write( " \"%28-4%29%28-14%29%28-6%29%3E0\"
\n" ); document.write( "\"-336%3E0\"
\n" ); document.write( "False
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( "Region \"2\", let \"x=-5\"
\n" ); document.write( " \"+%28x%2B6%29%28x-4%29%28x%2B4%29%3E0\"
\n" ); document.write( " \"+%28-5%2B6%29%28-5-4%29%28-5%2B4%29%3E0\"
\n" ); document.write( " \"%281%29%28-9%29%28-1%29%3E0\"
\n" ); document.write( "\"9%3E0\"
\n" ); document.write( "True
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( "Region \"3\", let \"x=0\"
\n" ); document.write( " \"+%28x%2B6%29%28x-4%29%28x%2B4%29%3E0\"
\n" ); document.write( " \"+%280%2B6%29%280-4%29%280%2B4%29%3E0\"
\n" ); document.write( " \"%286%29%28-4%29%284%29%3E0\"
\n" ); document.write( "\"-96%3E0\"
\n" ); document.write( "False
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( "Region \"4\", let \"x=5\"
\n" ); document.write( " \"+%28x%2B6%29%28x-4%29%28x%2B4%29%3E0\"
\n" ); document.write( " \"+%285%2B6%29%285-4%29%285%2B4%29%3E0\"
\n" ); document.write( " \"%2811%29%281%29%289%29%3E0\"
\n" ); document.write( "\"99%3E0\"
\n" ); document.write( "True
\n" ); document.write( "So then the solution includes Regions 2 and 4.
\n" ); document.write( "(\"-6\",\"-4\")U(\"4\",\"infinity\")
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