Paraax2+bx+c=0ax^2+bx+c=0, a≠0a\neq0: el discriminante esD=b2−4acD=b^2-4ac. Raíces:x1,2=−b±D2ax_{1,2}=\frac{-b\pm\sqrt{D}}{2a}(cuandoD≥0D\ge0). siD=0D=0— una raíz (doble); siD<0D<0– sin raíces reales.
Primero reescribe en forma estándar y leea,b,ca,b,c
D>0D>0- dos raíces reales distintas
D=0D=0—x=−b2ax=-\frac{b}{2a}
Signo del discriminante
DD¿Qué sucede con las raíces enR\mathbb{R}
D>0D>0Dos raíces distintas
D=0D=0Una raíz (multiplicidad 2)
D<0D<0Sin raíces reales
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