Sargun Nagpal
Last Activity: 10 Years ago
ax^2-bx+5=0.
Since the equation does not have 2 distinct real roots, therefore discriminant
i.e. b^2-20a
20a >/= b^2
5a >/= b^2 /4
5a+b >/= b^2/4 + b.
b^2/4 + b is a quadratic equation whose minimum value is -1/ (2* 1/4) = -2.
(Minimum value of ax^2+bx+c=0 where a>0 is -b/2a.
Hence required ans = -2