Question 9169
x^2-8x-2=0

For this problem you need to use the quadratic equation


{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}       (note a=1, b=-8, c=-2)


{{{x = (8 +- sqrt( (-8)^2-(4*1*-2) ))/(2*1) }}}

{{{x = (8 +- sqrt( 72 ))/(2*1) }}}

{{{x = (8 +- 6*sqrt( 2 ))/(2*1) }}}

{{{x = (4 +- 3*sqrt( 2 ))}}}