document.write( "Question 506795: Solve for x when 2x squared + 5x=12 \n" ); document.write( "
Algebra.Com's Answer #340542 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "\"2x%5E2%2B5x=12\" Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( "\"2x%5E2%2B5x-12=0\" Get every term to the left side.\r
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\n" ); document.write( "\n" ); document.write( "Notice that the quadratic \"2x%5E2%2B5x-12\" is in the form of \"Ax%5E2%2BBx%2BC\" where \"A=2\", \"B=5\", and \"C=-12\"\r
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\n" ); document.write( "\n" ); document.write( "Let's use the quadratic formula to solve for \"x\":\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-B+%2B-+sqrt%28+B%5E2-4AC+%29%29%2F%282A%29\" Start with the quadratic formula\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-%285%29+%2B-+sqrt%28+%285%29%5E2-4%282%29%28-12%29+%29%29%2F%282%282%29%29\" Plug in \"A=2\", \"B=5\", and \"C=-12\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-5+%2B-+sqrt%28+25-4%282%29%28-12%29+%29%29%2F%282%282%29%29\" Square \"5\" to get \"25\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-5+%2B-+sqrt%28+25--96+%29%29%2F%282%282%29%29\" Multiply \"4%282%29%28-12%29\" to get \"-96\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-5+%2B-+sqrt%28+25%2B96+%29%29%2F%282%282%29%29\" Rewrite \"sqrt%2825--96%29\" as \"sqrt%2825%2B96%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-5+%2B-+sqrt%28+121+%29%29%2F%282%282%29%29\" Add \"25\" to \"96\" to get \"121\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-5+%2B-+sqrt%28+121+%29%29%2F%284%29\" Multiply \"2\" and \"2\" to get \"4\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-5+%2B-+11%29%2F%284%29\" Take the square root of \"121\" to get \"11\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-5+%2B+11%29%2F%284%29\" or \"x+=+%28-5+-+11%29%2F%284%29\" Break up the expression. \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%286%29%2F%284%29\" or \"x+=++%28-16%29%2F%284%29\" Combine like terms. \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+3%2F2\" or \"x+=+-4\" Simplify. \r
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\n" ); document.write( "\n" ); document.write( "So the solutions are \"x+=+3%2F2\" or \"x+=+-4\" \r
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\n" ); document.write( "Let me know if you need more help or if you need me to explain a step in more detail.
\n" ); document.write( "Feel free to email me at jim_thompson5910@hotmail.com
\n" ); document.write( "or you can visit my website here: http://www.freewebs.com/jimthompson5910/home.html\r
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\n" ); document.write( "\n" ); document.write( "Thanks,\r
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\n" ); document.write( "\n" ); document.write( "Jim
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