document.write( "Question 1160508: Find an equation of the circle with center at the origin which passes through the point P(5,-3)\r
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Algebra.Com's Answer #783796 by MathLover1(20850)\"\" \"About 
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\n" ); document.write( "an equation of the circle is:\r
\n" ); document.write( "\n" ); document.write( "\"%28x-h%29%5E2%2B%28y-k%29%5E2=r%5E2\" where \"h\" and \"k\" are coordinates of the center, and \"r\" is a radius\r
\n" ); document.write( "\n" ); document.write( "given:
\n" ); document.write( "the circle with center at the origin, means \"h=0\" and \"k=0\"\r
\n" ); document.write( "\n" ); document.write( "so far your equation is\r
\n" ); document.write( "\n" ); document.write( "\"%28x-0%29%5E2%2B%28y-0%29%5E2=r%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2%2By%5E2=r%5E2\".....use given: circle passes through the point P(\"5\",\"-3\") to calculate \"r%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"5%5E2%2B%28-3%29%5E2=r%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"25%2B9=r%5E2\"\r
\n" ); document.write( "\n" ); document.write( "\"34=r%5E2\"\r
\n" ); document.write( "\n" ); document.write( "and your equation is\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2%2By%5E2=34\"\r
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