Two C-130 Hercules used to airlift food to Ghor province[?] in central Afghanistan during the winter returned to their African base. They had flown back and forth between Herat or Mashad[?], Iran and Ghor almost every day for five months, distributing 6,400 metric tons of food and seeds to more than 460,000 Afghans.
... for details.
Derivation
The quadratic formula is derived by the method of completing the square[?].
<math>ax^2+bx+c=0</math>
Dividing our quadratic ...