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CBSE Class 10 Maths (Standard) 2023 · Paper 30/6/1 · Question 9

Quadratic Equations 1 mark Medium

If the quadratic equation

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

has two real and equal roots, then 'c' is equal to

(a) $\frac{- b}{2 a}$
(b) $\frac{b}{2 a}$
(c) $\frac{- b ^{2}}{4 a}$
(d) $\frac{b ^{2}}{4 a}$

Answer

(d)

\frac{b ^{2}}{4 a}

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