document.write( "Question 195418: solve by completing the square\r
\n" );
document.write( "\n" );
document.write( "7x^2-2x-9=0 \n" );
document.write( "
Algebra.Com's Answer #146548 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! 7x^2-2x-9=0 \n" ); document.write( "7x^2-2x = 9 \n" ); document.write( "7(x^2 -(2/7)x ) = 9 \n" ); document.write( "7(x^2 -(2/7)x + __ ) = 9 \n" ); document.write( "7(x^2 -(2/7)x + 1/49 ) = 9 + 7(1/49) \n" ); document.write( "7(x^2 -(2/7)x + 1/49 ) = 441/49 + 7/49 \n" ); document.write( "7(x - 1/7)^2 = 448/49 \n" ); document.write( "(x - 1/7)^2 = 64/49 \n" ); document.write( "x - 1/7 = 8/7 \n" ); document.write( "x = 9/7 \n" ); document.write( " \n" ); document.write( " |