document.write( "Question 1173107: Please help me solve this quadratic equation and round the answer to the nearest hundredth\r
\n" ); document.write( "\n" ); document.write( "I also need to know the correct \"form.\" I'm new to quadratic equations and am struggling\r
\n" ); document.write( "\n" ); document.write( "form options
\n" ); document.write( "(x+[])^2=[] or (x-[])^2=[]\r
\n" ); document.write( "\n" ); document.write( "equation:\r
\n" ); document.write( "\n" ); document.write( "x^2+6x+7=0
\n" ); document.write( "

Algebra.Com's Answer #798249 by Boreal(15235)\"\" \"About 
You can put this solution on YOUR website!
x^2+6x+7=0
\n" ); document.write( "can complete the square
\n" ); document.write( "x^2+6x=-7 first step. Completing the square is taking half of the coefficient of the first power term (3), and squaring it, (9), adding it to both sides
\n" ); document.write( "x^2+6x+9=-7+9=2
\n" ); document.write( "now the left side is a perfect square
\n" ); document.write( "(x+3)^2=2
\n" ); document.write( "Take the square root of both sides
\n" ); document.write( "x+3=sqrt (2) and x+3=- sqrt(2)
\n" ); document.write( "x=-3 +sqrt(2) and x= -3- sqrt (2)
\n" ); document.write( "sqrt(2)=1.414
\n" ); document.write( "so x=-1.59 and x=-4.41\r
\n" ); document.write( "\n" ); document.write( "can check using the quadratic formula, which gives the same result
\n" ); document.write( "\"graph%28300%2C300%2C-5%2C5%2C-5%2C5%2Cx%5E2%2B6x%2B7%29\"
\n" ); document.write( "
\n" );