Discriminant of a quadratic (D equals b squared minus 4ac for ax²+bx+c=0 with a nonzero)

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D equals b squared minus 4ac for ax²+bx+c=0 with a nonzero

What each symbol means

SymbolWhat it stands for
DDiscriminant
aCoefficient of x² (nonzero)
bCoefficient of x
cConstant term

When to use this

Real coefficients; standard form ax²+bx+c=0 with a≠0.