Question

Which of the following is a quadratic equation?

Options

• X³ + 5X² + X + 3 = 0

• 4X² – 3X – 5 = 0

• X + 5 = 0

• 4X⁵ = 0

Answer 1

4X² – 3X – 5 = 0

Explanation:

Here, X is the only variable and maximum index of the variable is 2.

a = 4, b = –3, c = –5 are real numbers and a ≠ 0.