document.write( "Question 1041025: derive the quadratic formula by completing the square.
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Algebra.Com's Answer #655952 by ikleyn(52787)\"\" \"About 
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\n" ); document.write( "derive the quadratic formula by completing the square.
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\n" ); document.write( "\n" ); document.write( "See the lsson PROOF of quadratic formula by completing the square in this site.\r
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