Question 729389
y^2+72
{{{y = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
y=(-0+-sqrt(0^2-4*1*72))/2*1
y=(0+-sqrt(0-288)/2
y=(0+-sqrt-288)/2
y=(0+-16.87i)/2
y=0+-8.485i ans.