Decades: 970s 980s 990s 1000s 1010s - 1020s - 1030s 1040s 1050s 1060s 1070s
Years: 1015 1016 1017 1018 1019 - 1020 - 1021 1022 1023 1024 1025
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... 2. (In a field of characteristic 2, the element 2a is zero and it is impossible to divide by it.) The symbol <math>\pm \sqrt {b^2-4ac}</math> in the ...