计算(a²+8a+16)(a-4)(a+2)/(16-a²)(2a+8)(a-2) 麻烦过程写的清楚点,谢了

计算(a²+8a+16)(a-4)(a+2)/(16-a²)(2a+8)(a-2) 麻烦过程写的清楚点,谢了
计算(a²+8a+16)(a-4)(a+2)/(16-a²)(2a+8)(a-2) 麻烦过程写的清楚点,谢了

计算(a²+8a+16)(a-4)(a+2)/(16-a²)(2a+8)(a-2) 麻烦过程写的清楚点,谢了
(a²+8a+16)(a-4)(a+2)/(16-a²)(2a+8)(a-2)
=(a+4)²(a-4)(a+2)/-2(a+4)(a-4)(a+4)(a-2)
=-(a+2)/2(a-2)
=-(a+2)/(2a-4)

=(a+4)²(a-4)(a+2)/2[-(a+4)(a-4)](a+4)(a-2)
=-(a+2)/2(a-2)
=-(a+2)/(2a-4)