问题:
计算:
(1)(-2ab 2) 2-(3a 2b-2ab-1)(2)9(a-b) 2-(3a+b)(-b+3a)
计算:
(1)(-2ab 2) 2-(3a 2b-2ab-1)(2)9(a-b) 2-(3a+b)(-b+3a)
(1)(-2ab 2) 2-(3a 2b-2ab-1)(2)9(a-b) 2-(3a+b)(-b+3a)
参考答案: