a. Journalize the adjusting entry on December 31 for the impaired goodwill.
b. Journalize the adjusting entry on December 31 for the amortization of the patent rights.
Answer:

a. Dec. 31 Loss from Impaired Goodwill 4,000,000
Goodwill 4,000,000
Impaired goodwill.
b.
Dec. 31 Amortization Expense—Patents 25,000
Patents 25,000
Amortized patent rights
[($900,000 ÷ 15) × 5/12].