│c^2 (b+c)^2 b^2│
│c^2 a^2 (a+c)^2│
2. Prove that │1 a a^3│
│1 b b^3│=(a+b+c)(a-b)(b-c)(c-a)
│1 c c^3│
Please show the working without skipping too much steps. Thanks.
更新1:
非常感謝! 但第一題的答案同我書本提供既答案有出入 佢係:2abc(a+b+c)^3
更新2:
自由自在你可唔可以提供working?
更新3:
THANKS
