document.write( "Question 289720: Slove the quadric equation by completing the square. x^2 -5=8x \n" ); document.write( "

Algebra.Com's Answer #209778 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
Solve the quadratic equation by completing the square.
\n" ); document.write( "x^2 -5=8x
\n" ); document.write( "----
\n" ); document.write( "x^2 - 8x + ? = 5 + ?
\n" ); document.write( "----
\n" ); document.write( "Complete the square:
\n" ); document.write( "x^2 - 8x + 16 = 5 + 16
\n" ); document.write( "(x-4)^2 = 21
\n" ); document.write( "---
\n" ); document.write( "x-4 = +-sqrt(21)
\n" ); document.write( "x = [4 +-sqrt(21)]
\n" ); document.write( "=======================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( " \n" ); document.write( "

\n" );