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77

Centuries: 1st century BC - 1st century - 2nd century

Decades: 0s BC - 0s - 10s - 20s - 30s - 40s - 50s - 60s - 70s - 80s - 90s - 100s

72 73 74 75 76 77 78 79 80 81 82

Events:

Pliny the Elder published the first ten books of Naturalis Historia.

Births:

Deaths:

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Quadratic formula

... getting <math>x^2+\frac{b}{a}x+\frac{b^2}{4a^2}=-\frac{c}{a}+\frac{b^2}{4a^2}.</math> The left side is now a perfect square; it is the square of (x + ...