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1148

Centuries: 11th century - 12th century - 13th century

Decades: 1090s 1100s 1110s 1120s 1130s - 1140s - 1150s 1160s 1170s 1180s 1190s

Years: 1143 1144 1145 1146 1147 - 1148 - 1149 1150 1151 1152 1153

Events

Births

John of Brienne, future king of Jerusalem and Latin Emperor of Constantinople

Deaths

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Quadratic formula

... from both sides, we get <math>x=\frac{-b}{2a}\pm\frac{\sqrt{b^2-4ac}}{2a}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}.</math> Generalizations The formula and its ...