Algebra-2

Question Analysis
This question assesses the understanding of the degree of a polynomial and how it is preserved when combining like terms.

Key Concept Explanation
The degree of a polynomial is the highest power of the variable in the polynomial. When adding polynomials, the degree of the resulting polynomial is determined by the highest degree term present.

Step-by-step Solution
1. Identify the degrees of the given polynomials: has a degree of 4, and also has a degree of 4.
2. Combine the like terms:

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