If $$ h(x) = x^3 + 2x^2 + 8x $$ and $$ k(x) = -x^3 + x^2 - 5...

Question Analysis
This question assesses the student's ability to add two cubic functions and simplify the result.

Key Concept Explanation
When adding functions, the like terms are combined. For cubic functions, this means combining the coefficients of , , , and the constant terms.

Step-by-step Solution
1. Start with the given functions: and .
2. Add the functions:

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