document.write( "Question 640490: Add the proper constant to each binomial so that the resulting trinomial is a perfect square trinomial. Then factor the trinomial.
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Algebra.Com's Answer #403228 by jim_thompson5910(35256)\"\" \"About 
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Take half of the middle coefficient 8 to get 8/2 = 4\r
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\n" ); document.write( "\n" ); document.write( "Now square 4 to get 4^2 = 16\r
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\n" ); document.write( "\n" ); document.write( "So x^2 + 8x + 16 is a perfect square.
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