document.write( "Question 202657: Solve the following equation for A:2/A=8+4A \n" ); document.write( "
Algebra.Com's Answer #152832 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
\"2%2Fa=8%2B4a\" Start with the given equation.\r
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\n" ); document.write( "\n" ); document.write( "\"2=a%288%2B4a%29\" Multiply both sides by \"a\".\r
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\n" ); document.write( "\n" ); document.write( "\"2=8a%2B4a%5E2\" Distribute\r
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\n" ); document.write( "\n" ); document.write( "\"0=8a%2B4a%5E2-2\" Subtract 2 from both sides.\r
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\n" ); document.write( "\n" ); document.write( "\"0=4a%5E2%2B8a-2\" Rearrange the terms.\r
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\n" ); document.write( "\n" ); document.write( "Notice that the quadratic \"4a%5E2%2B8a-2\" is in the form of \"Aa%5E2%2BBa%2BC\" where \"A=4\", \"B=8\", and \"C=-2\"\r
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\n" ); document.write( "\n" ); document.write( "Let's use the quadratic formula to solve for \"a\":\r
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\n" ); document.write( "\n" ); document.write( "\"a+=+%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( "\"a+=+%28-%288%29+%2B-+sqrt%28+%288%29%5E2-4%284%29%28-2%29+%29%29%2F%282%284%29%29\" Plug in \"A=4\", \"B=8\", and \"C=-2\"\r
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\n" ); document.write( "\n" ); document.write( "\"a+=+%28-8+%2B-+sqrt%28+64-4%284%29%28-2%29+%29%29%2F%282%284%29%29\" Square \"8\" to get \"64\". \r
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\n" ); document.write( "\n" ); document.write( "\"a+=+%28-8+%2B-+sqrt%28+64--32+%29%29%2F%282%284%29%29\" Multiply \"4%284%29%28-2%29\" to get \"-32\"\r
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\n" ); document.write( "\n" ); document.write( "\"a+=+%28-8+%2B-+sqrt%28+64%2B32+%29%29%2F%282%284%29%29\" Rewrite \"sqrt%2864--32%29\" as \"sqrt%2864%2B32%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"a+=+%28-8+%2B-+sqrt%28+96+%29%29%2F%282%284%29%29\" Add \"64\" to \"32\" to get \"96\"\r
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\n" ); document.write( "\n" ); document.write( "\"a+=+%28-8+%2B-+sqrt%28+96+%29%29%2F%288%29\" Multiply \"2\" and \"4\" to get \"8\". \r
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\n" ); document.write( "\n" ); document.write( "\"a+=+%28-8+%2B-+4%2Asqrt%286%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( "\"a+=+%28-8%2B4%2Asqrt%286%29%29%2F%288%29\" or \"a+=+%28-8-4%2Asqrt%286%29%29%2F%288%29\" Break up the expression. \r
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\n" ); document.write( "\n" ); document.write( "\"a+=+%28-2%2Bsqrt%286%29%29%2F%282%29\" or \"a+=+%28-2%2Bsqrt%286%29%29%2F%282%29\" Reduce\r
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\n" ); document.write( "\n" ); document.write( "So the solutions are \"a+=+%28-2%2Bsqrt%286%29%29%2F%282%29\" or \"a+=+%28-2%2Bsqrt%286%29%29%2F%282%29\" \r
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\n" ); document.write( "\n" ); document.write( "which approximate to \"a=0.225\" or \"a=-2.225\"
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