Multiple choice Find the quadratic equation with real coefficients which has one root as 1 + 2i. x2 - 2x - 5 = 0 x2 - 2x + 5 = 0 x2 + 2x + 5 = 0 x2 + 2x - 5 = 0 None of these Reveal answer Fill a bubble to check yourself B Correct answer Explanation It is the correct answer.