text: solve and express the roots in a +bi form x squared -2x+5=0?   use the quadratic formula a = 1, b = -2 and c = 5 [-b +/- sqrt(b^2-4ac)]/(2a) = [2 +/- sqrt(4-4*1*5)]/(2*1) = [2 +/- sqrt(4-20)]/2 = [2 +/- sqrt(-16)]/2 = [2 +/- 4i]/2 = (2+4i)/2 or (2-4i)/2 = 1+2i or 1-2i