document.write( "Question 191307: Solve for x
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Algebra.Com's Answer #143581 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
a)\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2-6x%2B9=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=1\", \"b=-6\", and \"c=9\"\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-%28-6%29+%2B-+sqrt%28+%28-6%29%5E2-4%281%29%289%29+%29%29%2F%282%281%29%29\" Plug in \"a=1\", \"b=-6\", and \"c=9\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%286+%2B-+sqrt%28+%28-6%29%5E2-4%281%29%289%29+%29%29%2F%282%281%29%29\" Negate \"-6\" to get \"6\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%286+%2B-+sqrt%28+36-4%281%29%289%29+%29%29%2F%282%281%29%29\" Square \"-6\" to get \"36\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%286+%2B-+sqrt%28+36-36+%29%29%2F%282%281%29%29\" Multiply \"4%281%29%289%29\" to get \"36\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%286+%2B-+sqrt%28+0+%29%29%2F%282%281%29%29\" Subtract \"36\" from \"36\" to get \"0\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%286+%2B-+sqrt%28+0+%29%29%2F%282%29\" Multiply \"2\" and \"1\" to get \"2\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%286+%2B-+0%29%2F%282%29\" Take the square root of \"0\" to get \"0\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%286+%2B+0%29%2F%282%29\" or \"x+=+%286+-+0%29%2F%282%29\" Break up the expression. \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%286%29%2F%282%29\" or \"x+=++%286%29%2F%282%29\" Combine like terms. \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+3\" or \"x+=+3\" Simplify. \r
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\n" ); document.write( "\n" ); document.write( "So solution is \"x+=+3\" \r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2%2B4x%2B7=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=1\", \"b=4\", 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-%284%29+%2B-+sqrt%28+%284%29%5E2-4%281%29%287%29+%29%29%2F%282%281%29%29\" Plug in \"a=1\", \"b=4\", and \"c=7\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-4+%2B-+sqrt%28+16-4%281%29%287%29+%29%29%2F%282%281%29%29\" Square \"4\" to get \"16\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-4+%2B-+sqrt%28+16-28+%29%29%2F%282%281%29%29\" Multiply \"4%281%29%287%29\" to get \"28\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-4+%2B-+sqrt%28+-12+%29%29%2F%282%281%29%29\" Subtract \"28\" from \"16\" to get \"-12\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-4+%2B-+sqrt%28+-12+%29%29%2F%282%29\" Multiply \"2\" and \"1\" to get \"2\". \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+%28-4+%2B-+2i%2Asqrt%283%29%29%2F%282%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+=+%28-4%29%2F%282%29+%2B-+%282i%2Asqrt%283%29%29%2F%282%29\" Break up the fraction. \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+-2+%2B-+sqrt%283%29%2Ai\" Reduce. \r
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\n" ); document.write( "\n" ); document.write( "\"x+=+-2%2Bsqrt%283%29%2Ai\" or \"x+=+-2-sqrt%283%29%2Ai\" Break up the expression. \r
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\n" ); document.write( "\n" ); document.write( "So the answers are \"x+=+-2%2Bsqrt%283%29%2Ai\" or \"x+=+-2-sqrt%283%29%2Ai\" where \"i=sqrt%28-1%29\"\r
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\n" ); document.write( "\n" ); document.write( "Note: the solutions are in the form \"x=a%2Bbi\" or \"x=a-bi\" where \"a=-2\" and \"b=sqrt%283%29\"
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