document.write( "Question 236463: Please help me solve these:\r
\n" ); document.write( "\n" ); document.write( "5 x squared + 9x - 1 = 0\r
\n" ); document.write( "\n" ); document.write( "4 x sq + 12x + 7 = 0
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Algebra.Com's Answer #174036 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
# 1\r
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\n" ); document.write( "\n" ); document.write( "\"5x%5E2%2B9x-1=0\" Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( "Notice that the quadratic \"5x%5E2%2B9x-1\" is in the form of \"Ax%5E2%2BBx%2BC\" where \"A=5\", \"B=9\", and \"C=-1\"\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-%289%29+%2B-+sqrt%28+%289%29%5E2-4%285%29%28-1%29+%29%29%2F%282%285%29%29\" Plug in \"A=5\", \"B=9\", and \"C=-1\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-9+%2B-+sqrt%28+81-4%285%29%28-1%29+%29%29%2F%282%285%29%29\" Square \"9\" to get \"81\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-9+%2B-+sqrt%28+81--20+%29%29%2F%282%285%29%29\" Multiply \"4%285%29%28-1%29\" to get \"-20\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-9+%2B-+sqrt%28+81%2B20+%29%29%2F%282%285%29%29\" Rewrite \"sqrt%2881--20%29\" as \"sqrt%2881%2B20%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-9+%2B-+sqrt%28+101+%29%29%2F%282%285%29%29\" Add \"81\" to \"20\" to get \"101\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-9+%2B-+sqrt%28+101+%29%29%2F%2810%29\" Multiply \"2\" and \"5\" to get \"10\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-9%2Bsqrt%28101%29%29%2F%2810%29\" or \"x+=+%28-9-sqrt%28101%29%29%2F%2810%29\" Break up the expression. \r
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\n" ); document.write( "\n" ); document.write( "So the solutions are \"x+=+%28-9%2Bsqrt%28101%29%29%2F%2810%29\" or \"x+=+%28-9-sqrt%28101%29%29%2F%2810%29\" \r
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\n" ); document.write( "\n" ); document.write( "which approximate to \"x=0.105\" or \"x=-1.905\" \r
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\n" ); document.write( "\n" ); document.write( "# 2\r
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\n" ); document.write( "\n" ); document.write( "\"4x%5E2%2B12x%2B7=0\" Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( "Notice that the quadratic \"4x%5E2%2B12x%2B7\" is in the form of \"Ax%5E2%2BBx%2BC\" where \"A=4\", \"B=12\", and \"C=7\"\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-%2812%29+%2B-+sqrt%28+%2812%29%5E2-4%284%29%287%29+%29%29%2F%282%284%29%29\" Plug in \"A=4\", \"B=12\", and \"C=7\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-12+%2B-+sqrt%28+144-4%284%29%287%29+%29%29%2F%282%284%29%29\" Square \"12\" to get \"144\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-12+%2B-+sqrt%28+144-112+%29%29%2F%282%284%29%29\" Multiply \"4%284%29%287%29\" to get \"112\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-12+%2B-+sqrt%28+32+%29%29%2F%282%284%29%29\" Subtract \"112\" from \"144\" to get \"32\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-12+%2B-+sqrt%28+32+%29%29%2F%288%29\" Multiply \"2\" and \"4\" to get \"8\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-12+%2B-+4%2Asqrt%282%29%29%2F%288%29\" Simplify the square root (note: If you need help with simplifying square roots, check out this solver) \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-12%2B4%2Asqrt%282%29%29%2F%288%29\" or \"x+=+%28-12-4%2Asqrt%282%29%29%2F%288%29\" Break up the expression. \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-3%2Bsqrt%282%29%29%2F%282%29\" or \"x+=+%28-3-sqrt%282%29%29%2F%282%29\" Reduce.\r
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\n" ); document.write( "\n" ); document.write( "So the solutions are \"x+=+%28-3%2Bsqrt%282%29%29%2F%282%29\" or \"x+=+%28-3-sqrt%282%29%29%2F%282%29\"\r
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\n" ); document.write( "\n" ); document.write( "which approximate to \"x=-0.793\" or \"x=-2.207\"
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