document.write( "Question 231064: X^2+4X=9\r
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Algebra.Com's Answer #171084 by troymuga(3)![]() ![]() ![]() You can put this solution on YOUR website! Method: Completing the Square.\r \n" ); document.write( "\n" ); document.write( "x² + 4x + 9 =\r \n" ); document.write( "\n" ); document.write( "Subtract 9 from both sides. \n" ); document.write( "x² + 4x = -9\r \n" ); document.write( "\n" ); document.write( "Now you're ready to complete the square. \n" ); document.write( "x² + 4x + ______ = -9 + ______\r \n" ); document.write( "\n" ); document.write( "Take the coefficient of the x term: 4 \n" ); document.write( "Divide it by 2: 4/2 = 2 \n" ); document.write( "Square it: 2² = 4 \n" ); document.write( "Add this to both sides. \n" ); document.write( "x² + 4x + 4 = -9 + 4 \n" ); document.write( "(x + 2)² = -5\r \n" ); document.write( "\n" ); document.write( "Add 5 to both sides. \n" ); document.write( "(x + 2)² + 5 \n" ); document.write( " |