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248

Centuries: 2nd century - 3rd century - 4th century

Decades: 190s 200s 210s 220s 230s - 240s - 250s 260s 270s 280s 290s

Years: 243 244 245 246 247 - 248 - 249 250 251 252 253


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Quadratic formula

... 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 formula should be understood as ...

 
 
 
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