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1182

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

Decades: 1130s 1140s 1150s 1160s 1170s - 1180s - 1190s 1200s 1210s 1220s 1230s

Years: 1177 1178 1179 1180 1181 - 1182 - 1183 1184 1185 1186 1187

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Quadratic formula

... coefficients a, b and c, which are assumed to be real (but see below for generalizations) with a being non-zero. These solutions are also called the roots of the equation. ...