document.write( "Question 1090252: x²+4x+y²-4y=-4,(x-2)²+(y-2)²=4
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Algebra.Com's Answer #704700 by ikleyn(52797) $\"\"$ $\"About$

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document.write( " = 4,    (1)\r\n" );
document.write( " = 4.    (2)\r\n" );
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document.write( "Open the parentheses in equation (2). You will get\r\n" );
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document.write( " = 4,    (1')\r\n" );
document.write( " = -4.   (2')\r\n" );
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document.write( "Subtract eq(1') from eq(2') (both sides). You will get\r\n" );
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document.write( "-8x = -4 - 4 = -8.\r\n" );
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document.write( "Hence, x = 1.\r\n" );
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document.write( "Now, substitute x= 1 into either of the two equations (1') or (2') and solve for y.\r\n" );
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document.write( "Can you complete these simple calculations on your own ?\r\n" );
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\n" ); document.write( "\n" ); document.write( "For many similar solved problems/samples see the lesson\r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-I in this site\r
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\n" ); document.write( "\n" ); document.write( "The referred lesson is the part of this online textbook under the topic \"Systems of equations that are not linear\".\r
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