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426

Centuries: 4th century - 5th century - 6th century

Decades: 370s 380s 390s 400s 410s - 420s - 430s 440s 450s 460s 470s

Years: 421 422 423 424 425 - 426 - 427 428 429 430 431


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Quadratic formula

... Loss of significance for details. Derivation The quadratic formula is derived by the method of completing the square[?]. ...

 
 
 
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