document.write( "Question 134301: 5x^2 - 80x = 240 - 15x^2 \n" ); document.write( "
Algebra.Com's Answer #98218 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
\"5x%5E2-80x=240-15x%5E2\" Start with the given equation\r
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\n" ); document.write( "\n" ); document.write( "\"5x%5E2-80x-240%2B15x%5E2=0\" Subtract 240 from both sides. Add 15x^2 to both sides. \r
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\n" ); document.write( "\n" ); document.write( "\"20x%5E2-80x-240=0\" Combine like terms\r
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\n" ); document.write( "\n" ); document.write( "\"20%28x-6%29%28x%2B2%29=0\" Factor the left side \r
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\n" ); document.write( "\n" ); document.write( "Now set each factor equal to zero:\r
\n" ); document.write( "\n" ); document.write( "\"x-6=0\" or \"x%2B2=0\" \r
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\n" ); document.write( "\n" ); document.write( "\"x=6\" or \"x=-2\" Now solve for x in each case\r
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\n" ); document.write( "\n" ); document.write( "So our solutions are\r
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\n" ); document.write( "\n" ); document.write( " \"x=6\" or \"x=-2\" \r
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