Decades: 50s BC 40s BC 30s BC 20s BC 10s BC - 0s BC - 0s 10s 20s 30s 40s
8 BC7 BC 6 BC 5 BC 4 BC 3 BC 2 BC 1 BC 1 2 3
Births
Deaths
... to the left of "=", that will make it a perfect square trinomial of the form x2 + 2xy + y2. Since "2xy" in this case is (b/a)x, we must have y = b/(2a), so we add the ...