Question

what are the roots for the quadratic equation ax2-bx+c=0

Answer 1

real and equal roots in equation .

Answer 2

x=-b+ root(b^2-4ac)/2a, -b- root(b^2-4ac)/2a
this is also known as quadratic formula
now if b^2-4ac which is also known as discriminant or D :
D=0 both roots will be real and equal
D>0 both roots will be real and distinct
D<0 no real roots