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By the 12th century, al-Karaji's successors were to state the general rules of signs and use them to solve polynomial divisions. [25] As al-Samaw'al writes: the product of a negative number—al-nāqiṣ—by a positive number—al-zāʾid—is negative, and by a negative number is positive. If we subtract a negative number from a higher ...
For example, sources based on some archaeological data give the construction date of Masjid al-Haram, an architectural work mentioned 16 times in the Quran, as 78 AH [75] an additional finding that sheds light on the evolutionary history of the Quran mentioned, [74] which is known to continue even during the time of Hajjaj, [76] [77] in a ...