Question

Which of the following is not a quadratic equation?

Options

• x² + 3x – 5 = 0

• x² + x³ + 2 = 0

• 3 + x + x² = 0

• x² – 9 = 0

Answer 1

x² + x³ + 2 = 0

Explanation:

Since it has degree 3.