Which algebraic expression is a polynomial with a degree of 5?

For a polynomial with multiple variables, the degree of each term is the sum of its exponents. In choice B, the terms have degrees 1 + 4 = 5, 2 + 3 = 5, 3 + 2 = 5, and 4. The greatest of these is 5, so 2xy⁴ + 4x²y³ − 6x³y² − 7x⁴ is a polynomial of degree 5.

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