Let $ y = x - 1 - rac1x $ — not helpful. Try numerical values. From $ z + w = 2 + 4i $, $ zw = 13 - 2i $, $ z $ and $ w $ are roots of $ t^2 - (2 + 4i)t + (13 - 2i) = 0 $. Compute discriminant $ D = (2 + 4i)^2 - 4(13 - 2i) = 4 + 16i - 16 - 52 + 8i = -64 + 24i $. Let $ \sqrtD = a + bi $, then $ (a + bi)^2 = a^2 - b^2 + 2abi = -64 + 24i $. So: - Groen Casting