document.write( "Question 959129: What is the value of c so that y=x^2+15x+c is a perfect square trinomial \n" ); document.write( "
Algebra.Com's Answer #586218 by jim_thompson5910(35256)\"\" \"About 
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15 is the x coefficient\r
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\n" ); document.write( "\n" ); document.write( "take half of 15 to get 15/2\r
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\n" ); document.write( "\n" ); document.write( "Square 15/2 to get (15/2)^2 = 225/4\r
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\n" ); document.write( "\n" ); document.write( "The value of c is 225/4\r
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