document.write( "Question 824460: what must be added to 7x^2-10x to make a perfect square. Thanks \n" ); document.write( "
Algebra.Com's Answer #496516 by richwmiller(17219)\"\" \"About 
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25/49
\n" ); document.write( "to find it first divide by 7
\n" ); document.write( "and we get
\n" ); document.write( "x^2-10/7x
\n" ); document.write( "take half of 10/7 which is 5/7 and square it 25/49\r
\n" ); document.write( "\n" ); document.write( "x^2-10/7x+25/49=25/49
\n" ); document.write( "(x-5/7)^2=25/49
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