化简(a+ 3)(a-3) (a-5)(a+7)-2a(a-1)
问题描述:
化简(a+ 3)(a-3) (a-5)(a+7)-2a(a-1)
答
(a+ 3)(a-3)+ (a-5)(a+7)-2a(a-1)
=a平方-9+a平方+2a-35-2a平方+2a
=4a-44谢谢哦不客气,采纳吧恩恩采纳吧