The Africa Alphabet was developed 1928 under the lead of Diedrich Westermann. He developed it with a group of Africanists[?] at the IAI[?] in London. Its aim was to be able to write all the African languages for practical and scientific purposes.
... different solutions x, both of which are real. (Geometrically, this means that the parabola intersects the x-axis in two points.)
If the discriminant is negative, then ...