Algebra-1

Question Analysis
This question tests the student's ability to simplify a polynomial and then determine its degree.

Key Concept Explanation
To find the degree of a polynomial, first simplify it by combining like terms. Then, identify the highest degree among the terms of the simplified polynomial.

Step-by-step Solution
1. Distribute the 3x in the first term:
2. Combine the distributed terms with the rest of the polynomial:
3. Combine like terms:

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