Controparte wikipedica del Cafi96 nonciclopedico.[senza fonte]
− b ± b 2 − 4 a c 2 a {\displaystyle {\frac {-b\pm {\sqrt {b^{2}-4ac}}}{2a}}} = − b 2 ± ( b 2 ) 2 − a c a {\displaystyle {\frac {-{\frac {b}{2}}\pm {\sqrt {{\big (}{\frac {b}{2}}{\big )}^{2}-ac}}}{a}}}
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