In the shadows of modern Tokyo, a group of mysterious individuals who have inherited an ancient legacy work to defend ordinary people from the horrors that remain hidden in our world. These are the stories of the Tokeshu.
taking the coefficient of X and dividing 
it by two before squaring it.
أخذ مُعامِل المجهول وتقسيمه
على اثنين قبل تربيعه
müssen wir den Koeffizienten von X nehmen
und den durch 2 teilen, bevor wir quadrieren.
significa pegar o coeficiente de x e dividi-lo
por dois antes de elevar ao quadrado.
взять коэффициент при X и разделить его
на два перед возведением в квадрат.