We know that while finding the root of a quadratic equation ax2+bx+c=0 by quadratic formula x=−b±√b2−4ac2a,
if b2−4ac>0, then the roots are real and distinct
if b2−4ac=0, then the roots are real and equal and
if b2−4ac<0, then the roots are imaginary.
Here, the given quadratic equation x2−2x+3=0 is in the form ax2+bx+c=0 where a=1,b=−2 and c=3, therefore,
b2−4ac=(−2)2−(4×1×3)=4−12=−8<0
Since b2−4ac<0
Hence the roots are imaginary or no real roots.