1,(a-b)^2(3a-2)+(2-3a)b^2
2,(a+b)^2+10(a+b)(a-b)+25(a-b)
參考答案:1)(a-b)^2(3a-2)-(3a-2)b^2
=(3a-2)[(a-b)^2-b^2]
=(3a-2)(a^2-2ab)
=a(3a-2)(a-2b)
2)估计你题目打错了，25(a-b)^2应该这样吧？
(a+b)^2+10(a+b)(a-b)+25(a-b)^2
=[(a+b)+5(a-b)]^2
=(a+b+5a-5b)^2
=(6a-4b)^2
=4(3a-2b)^2