document.write( "Question 1009335: What must be added to x2^-7x to make it a perfect square? \n" ); document.write( "
Algebra.Com's Answer #624850 by fractalier(6550)![]() ![]() You can put this solution on YOUR website! You take half the x-term coefficient and square it...thus from \n" ); document.write( "x^2 - 7x, we take half of -7 and get -3.5, then square it and get \n" ); document.write( "12.25 \n" ); document.write( "so that x^2 - 7x + 12.25 = (x - 3.5)^2 \n" ); document.write( "a perfect square... \n" ); document.write( " |