Question

If ax² + bx + c = 0 has equal roots, then c = ?

Options

• `b/(2a)`

• `(b^2)/(4a)`

• `-b/(2a)`

• `-(b^2)/(4a)`

Answer 1

`bb((b^2)/(4a))`

Explanation:

Given,

ax² + bx + c = 0 has equal roots

Since equations has equal roots,

Discriminant (D) = 0

⇒ b² – 4ac = 0

⇒ b² = 4ac

⇒ `c = (b^2)/(4a)`