document.write( "Question 962829: Could you please help solve this quadratic equation using completing the square method?\r
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document.write( "x^2+9x+8=0 \n" );
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Algebra.Com's Answer #588246 by lwsshak3(11628)![]() ![]() ![]() You can put this solution on YOUR website! Could you please help solve this quadratic equation using completing the square method? \n" ); document.write( "x^2+9x+8=0 \n" ); document.write( "complete the square: (take 1/2 the coefficient of the x-term(9/2) and square it) \n" ); document.write( "(x^2+9x+81/4)-81/4+8=0 \n" ); document.write( "(x+9/2)^2=81/4-32/4=49/4 \n" ); document.write( "(x+9/2)^2=49/4 \n" ); document.write( "take sqrt of both sides \n" ); document.write( "x+9/2=±√(49/4) \n" ); document.write( "x=-9/2±7/2 \n" ); document.write( "x=-16/2=-8 \n" ); document.write( "or \n" ); document.write( "x=-2/2=-1 \n" ); document.write( " |