Final answer:
To add the given binomials, group the like terms and combine the coefficients. The final answer is -7b⁵.
Step-by-step explanation:
To add the given binomials, we can combine like terms. The first step is to group the like terms together. The terms with the same exponent of b can be grouped. Then you can combine the coefficients of the like terms to get the final answer. In this case, the like terms are 11b⁵ and -18b⁵, and 8b⁷ and -8b⁷. The coefficients of the like terms are 11 and -18, and 8 and -8. Adding the coefficients of the like terms, we get (-18 + 11)b⁵ = -7b⁵ and (8 - 8)b⁷ = 0b⁷. Therefore, the final answer is -7b⁵ + 0b⁷, which simplifies to -7b⁵.
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