document.write( "Question 321856: Please help me solve this equation: 64x^2-128x-64
\n" ); document.write( "note: it is -128x not -28x \n" ); document.write( "

Algebra.Com's Answer #230416 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
solve this equation:
\n" ); document.write( "64x^2-128x-64 = 0
\n" ); document.write( "---
\n" ); document.write( "Factor:
\n" ); document.write( "64(x^2-2x-1) = 0
\n" ); document.write( "Divide by 64 to get:
\n" ); document.write( "x^2-2x-1 = 0
\n" ); document.write( "---------------------
\n" ); document.write( "Quadratic Formula:
\n" ); document.write( "x = [2 +- sqrt(4-4*1*-1)]/2
\n" ); document.write( "---
\n" ); document.write( "x = [2 +- sqrt(8)]/2
\n" ); document.write( "---
\n" ); document.write( "x = [2 +- 2sqrt(2)]/2
\n" ); document.write( "---
\n" ); document.write( "x = 1 + sqrt(2) or x = 1-sqrt(2)
\n" ); document.write( "=====================================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( " \n" ); document.write( "

\n" );