document.write( "Question 109255: Please help me solve by completing the square, and if you can show me that would be great! \r
\n" );
document.write( "\n" );
document.write( "4. Solve by completing the square:
\n" );
document.write( "x2 + 6x + 1 = 0
\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #79663 by stanbon(75887) ![]() You can put this solution on YOUR website! Solve by completing the square: \n" ); document.write( "x^2 + 6x + 1 = 0 \n" ); document.write( "--------- \n" ); document.write( "x^2+6x+? = -1+? \n" ); document.write( "x^2+6x + [(1/2)6]^2 = -1 + [(1/2)6]^2 \n" ); document.write( "x^2+6x+9 = -1+9 \n" ); document.write( "Factor: \n" ); document.write( "(x+3)^2 = 8 \n" ); document.write( "Take the square root of both sides to get:\r \n" ); document.write( "\n" ); document.write( "x+3 = 2sqrt2 or x+3 = -2sqrt2\r \n" ); document.write( "\n" ); document.write( "x = -3+2sqrt2 or x = -3-2sqrt2 \n" ); document.write( "============ \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( " |