document.write( "Question 1191709: A point P(x,y) moves in such a way that its distance from (3,2) is always one half of its distance from (-1,3). find the equation of the locus \n" ); document.write( "
Algebra.Com's Answer #823534 by ikleyn(52788)\"\" \"About 
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\n" ); document.write( "A point P(x,y) moves in such a way that its distance from (3,2) is always
\n" ); document.write( "one half of its distance from (-1,3). find the equation of the locus
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document.write( "Write an equation as you read the problem\r\n" );
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document.write( "    \"sqrt%28%28x-3%29%5E2%2B%28y-2%29%5E2%29\" = \"%281%2F2%29%2Asqrt%28%28x%2B1%29%5E2+%2B+%28y-3%29%5E2%29\".\r\n" );
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document.write( "Square both side\r\n" );
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document.write( "    (x-3)^2 + (y-2)^2 = \"%281%2F4%29\".( (x+1)^2 + (y-3)^2 )\r\n" );
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document.write( "Simplify it step by step\r\n" );
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document.write( "    4 * ( (x-3)^2 + (y-2)^2 ) = (x+1)^2 + (y-3)^2\r\n" );
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document.write( "    4*(x^2 - 6x + 9 + y^2 -4y + 4) = x^2 + 2x + 1 + y^2 - 6y + 9\r\n" );
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document.write( "    4x^2 - 24x + 36 + 4y^2 - 16y + 16 = x^2 + 2x + 1 + y^2 - 6y + 9\r\n" );
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document.write( "The further simplification is routine bothering calculations, from which you will learn NOTHING. \r\n" );
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document.write( "It is a standard completing the square procedure.\r\n" );
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document.write( "So I will complete by referring to specialized online calculator\r\n" );
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document.write( "https://www.equationcalc.com/conics-section-calculator\r\n" );
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document.write( "Copy/paste the last equation to this calculator input port and get there the answer: final equation is \r\n" );
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document.write( "    \"%28x-%2813%2F3%29%29%5E2\" + \"%28y-%285%2F3%29%29%5E2\" = \"%282%2F3%29%5E2%2A17\".\r\n" );
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document.write( "It is the standard form equation of the circle with the center at the point (\"13%2F3\",\"5%2F3\")  with the radius of  \"%282%2F3%29%2Asqrt%2817%29\".\r\n" );
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\n" ); document.write( "\n" ); document.write( "It is really BAD problem to learn from.\r
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\n" ); document.write( "\n" ); document.write( "My condolences . . . \r
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\n" ); document.write( "\n" ); document.write( "Would somebody asked me about an educational value of this problem, I'd say it is zero.\r
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