document.write( "Question 151294: 3x^2 + 8x - 3 = 0 \n" ); document.write( "
Algebra.Com's Answer #111195 by jim_thompson5910(35256)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "\"3x%5E2%2B8x-3=0\" Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( "Notice we have a quadratic equation in the form of \"ax%5E2%2Bbx%2Bc\" where \"a=3\", \"b=8\", and \"c=-3\"\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-%288%29+%2B-+sqrt%28+%288%29%5E2-4%283%29%28-3%29+%29%29%2F%282%283%29%29\" Plug in \"a=3\", \"b=8\", and \"c=-3\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-8+%2B-+sqrt%28+64-4%283%29%28-3%29+%29%29%2F%282%283%29%29\" Square \"8\" to get \"64\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-8+%2B-+sqrt%28+64--36+%29%29%2F%282%283%29%29\" Multiply \"4%283%29%28-3%29\" to get \"-36\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-8+%2B-+sqrt%28+64%2B36+%29%29%2F%282%283%29%29\" Rewrite \"sqrt%2864--36%29\" as \"sqrt%2864%2B36%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-8+%2B-+sqrt%28+100+%29%29%2F%282%283%29%29\" Add \"64\" to \"36\" to get \"100\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-8+%2B-+sqrt%28+100+%29%29%2F%286%29\" Multiply \"2\" and \"3\" to get \"6\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-8+%2B-+10%29%2F%286%29\" Take the square root of \"100\" to get \"10\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-8+%2B+10%29%2F%286%29\" or \"x+=+%28-8+-+10%29%2F%286%29\" Break up the expression. \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%282%29%2F%286%29\" or \"x+=++%28-18%29%2F%286%29\" Combine like terms. \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+1%2F3\" or \"x+=+-3\" Simplify. \r
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\n" ); document.write( "\n" ); document.write( "So our answers are \"x+=+1%2F3\" or \"x+=+-3\" \r
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