求解红线中的式子怎么化简

2025-04-27 13:00:47
推荐回答(2个)
回答1:

回答2:

(5-k)(6-k)(4-k) - 4(4-k) - 4(6-k)
= (5-k)(6-k)(4-k) - 8(5-k)
= (5-k)(24-10k+k^2-8)
= (5-k)(2-k)(8-k)