document.write( "Question 774946: a point is at a distance 4 sqrt of 2 units from (-3/2,-5/2) and at a distance 2 sqrt of 5 units from (9/2,-5/2), find the point \n" ); document.write( "
Algebra.Com's Answer #472551 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
[ a point is at a distance \"4sqrt%282%29\" units from (-3/2,-5/2) and at a distance \"2%2Asqrt%285%29\" units from (9/2,-5/2), find the point ]\r
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\n" ); document.write( "\n" ); document.write( "This point is unknown (x,y).\r
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\n" ); document.write( "\n" ); document.write( "Look for one or two triangles with one side \"9%2F2-%28-3%2F2%29\" units long, and two other sides which are the two given lengths:\r
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\n" ); document.write( "\"4%2Asqrt%282%29=sqrt%28%28x-%28-3%2F2%29%29%5E2%2B%28y-%28-5%2F2%29%29%5E2%29\"
\n" ); document.write( "\"4%2Asqrt%282%29=sqrt%28%28x%2B3%2F2%29%5E2%2B%28y%2B5%2F2%29%5E2%29\"
\n" ); document.write( "\"highlight%2832=%28x%2B3%2F2%29%5E2%2B%28y%2B5%2F2%29%5E2%29\"_______We can make more use of this one.
\n" ); document.write( "which is a circle\r
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\n" ); document.write( "\n" ); document.write( "\"2%2Asqrt%285%29=sqrt%28%28x-9%2F2%29%5E2%2B%28y-%28-5%2F2%29%29%29\"
\n" ); document.write( "\"highlight%2820=%28x-9%2F2%29%5E2%2B%28y%2B5%2F2%29%5E2%29\"_______ .
\n" ); document.write( "also a circle\r
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\n" ); document.write( "\n" ); document.write( "These two circles both contain the expression \"%28y%2B5%2F2%29%5E2\", which give us a way to relate them.
\n" ); document.write( "\"32-%28x%2B3%2F2%29%5E2=20-%28x-9%2F2%29%5E2\"
\n" ); document.write( "\"%28x-9%2F2%29%5E2-%28x%2B3%2F2%29%5E2-20+%2B32=0\"
\n" ); document.write( "\"x%5E2-%2818%2F2%29x%2B81%2F4-%28x%5E2%2B%286%2F2%29x%2B9%2F4%29%2B12=0\"
\n" ); document.write( "\"x%5E2-9x%2B81%2F4-%28x%5E2%2B6x%2B9%2F4%29%2B12=0\"
\n" ); document.write( "\"-9x%2B81%2F4-6x-9%2F4%2B12=0\"
\n" ); document.write( "\"-15x%2B12%2B72%2F4=0\"
\n" ); document.write( "\"-15x%2B12%2B18=0\"
\n" ); document.write( "\"15x=30\"
\n" ); document.write( "\"highlight%28x=2%29\"\r
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\n" ); document.write( "\n" ); document.write( "What you now want to do, is go back to this same circle equation, solve it for y, and assign x=2 and find the value for y. You will get two solutions for this y. Whatever y is found to be, the two points wanted will be (2, y) and (2, -y).
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