document.write( "Question 121032: Solve by completing the square:4x^2+8x-7=0.Express roots in EXACT radical form. \n" ); document.write( "
Algebra.Com's Answer #88792 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
\"4x%5E2%2B8x-7=0\"
\n" ); document.write( "\"x%5E2%2B2x-7%2F4=0\"Divide both sides by 4.\r
\n" ); document.write( "\n" ); document.write( "\"x%5E2%2B2x-7%2F4%2B1=1\"Add 1 to both sides of the equation\r
\n" ); document.write( "\n" ); document.write( "\"%28x%5E2%2B2x%2B1%29-7%2F4=1\"\r
\n" ); document.write( "\n" ); document.write( "\"%28x%2B1%29%5E2-7%2F4=1\" Complete the square.\r
\n" ); document.write( "\n" ); document.write( "\"%28x%2B1%29%5E2=1%2B7%2F4\"Add 7/4 both sides.\r
\n" ); document.write( "\n" ); document.write( "\"%28x%2B1%29%5E2=4%2F4%2B7%2F4\"Same denominator on the right hand side.\r
\n" ); document.write( "\n" ); document.write( "\"%28x%2B1%29%5E2=11%2F4\"\r
\n" ); document.write( "\n" ); document.write( "1.\"+x%2B1=sqrt%2811%29%2F2\"First solution\r
\n" ); document.write( "\n" ); document.write( "\"x=sqrt%2811%29%2F2-1\"\r
\n" ); document.write( "\n" ); document.write( "2. \"x%2B1=-sqrt%2811%29%2F2\"Second solution\r
\n" ); document.write( "\n" ); document.write( "\"x=-sqrt%2811%29%2F2-1\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );