问题:
计算:
(1)(a-2)(a+2)(a 2+4)
(2)(2m 3n 2+3m 2n 2-mn 3+4mn)÷(-6mn)
计算:
(1)(a-2)(a+2)(a 2+4)
(2)(2m 3n 2+3m 2n 2-mn 3+4mn)÷(-6mn)
(1)(a-2)(a+2)(a 2+4)
(2)(2m 3n 2+3m 2n 2-mn 3+4mn)÷(-6mn)
参考答案: