Algebra-1

The degree of a polynomial is determined by the highest power of the variable.

Option A: (x³ + 1)(x² - 1) = x⁵ - x³ + x² - 1, degree is 5.

Option B: (x² + 2x + 1)(x² - 2x + 1) = x⁴ + 2x² + 1, degree is 4.