Explanation

Polynomials are classified by:

1. Number of terms

2. Degree (highest exponent)

By number of terms:

• Monomial: one term → 5x²

• Binomial: two terms → x + 3

• Trinomial: three terms → x² + 2x + 1

By degree:

• Constant: degree 0 → 7

• Linear: degree 1 → 3x + 2

• Quadratic: degree 2 → x² − 4

• Cubic: degree 3 → x³ + x