Question 1025307
Use the quadratic equation,
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
{{{x = (-(-5) +- sqrt( (-5)^2-4*2*4 ))/(2*2) }}} 
{{{x = (5 +- sqrt( 25-32 ))/(4) }}} 
{{{x = (5 +- sqrt( -7))/(4) }}} 
{{{x = (5 +- sqrt(7)i)/(4) }}} 
Do the second one exactly the same way.