document.write( "Question 321782: Identify the numbers that needs to be added to both sides of the equation x^2 - 4x +21 to complete the square.\r
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Algebra.Com's Answer #230388 by solver91311(24713)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "Divide the coefficient on the first degree term by 2 and then square the result.\r
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