Question

The discriminant of the quadratic equation ax² + x + a = 0 is ______.

Options

• `sqrt(1 - 4a^2)`

• 1 – 4a²

• 4a² – 1

• `sqrt(4a^2 - 1)`

Answer 1

The discriminant of the quadratic equation ax² + x + a = 0 is 1 – 4a².

Explanation:

Given,

ax² + x + a = 0

Discriminant = b² – 4ac 

= (1)² – 4 × a × a

= 1 – 4a²