Decades: 20s 30s 40s 50s 60s - 70s - 80s 90s 100s 110s 120s
Years: 70 71 72 73 74 - 75 - 76 77 78 79 80
Deaths
... are complex numbers. The two solutions are complex conjugates of each other. (In this case, the parabola does not intersect the x-axis at all.) Note that whe ...