To add polynomials, you combine like terms, but since only one polynomial is provided, adding it to another unspecified polynomial is not possible without more information.
To add the polynomials 3.2x³ + 4.8x and another unspecified polynomial, one would simply combine like terms. This is a fundamental concept in algebra known as polynomial addition. However, since the question only provides one polynomial, adding it to another unspecified polynomial isn't possible without more information. Were another polynomial provided, one would look for terms with the same powers of x and combine their coefficients.