¿De dónde sale la fórmula general de segundo grado? (Demostración)

Playlist of Arithmetic:    • Curso Completo de Aritmética   Playlist of Algebra:    • Curso Completo de Álgebra   In this video we will see the demonstration of the formula to solve a general equation of second degree, step by step, using complete the perfect square trinomial, clearing a square to a root with its two signs, common term factorization, simplification of algebraic fractions , subtraction of algebraic fractions. ------------------------------------------- Facebook:   / arquimedes1075   Instagram:   / matefacilx   if you like my videos you can to support me with a donation on: Paypal: https://www.paypal.com/cgi-bin/webscr... Patreon:   / matefacil   Thank you! :D