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What is the formula for the discriminant of the quadratic equation $a x^{2} + b x + c = 0$ ?

Class 10Discriminant and Nature of RootsAlgebra — Quadratics

A $b^{2} - 4 a c$
B $b^{2} + 4 a c$
C $4 a c - b^{2}$
D $a^{2} - 4 b c$

Step-by-Step Solution

The discriminant is denoted

D = b^{2} - 4 a c

. It decides the nature of the roots of

a x^{2} + b x + c = 0

.

Answer: A)

b^{2} - 4 a c

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