Question 357861
{{{2x^2 -5x = -10}}}
{{{2x^2 -5x +10=0}}}
 {{{x = (-(-5) +- sqrt( (-5)^2-4*2*(10) ))/(2*2) }}} 
{{{x = (5 +- sqrt( 25-80 ))/(4) }}}
 {{{x = (5 +- sqrt( -55))/(4) }}}
 {{{highlight(x = (5 +- sqrt( 55)i)/(4)) }}} where {{{i=sqrt(-1)}}}