a(a-b)²-4a怎么解?
问题描述：
a(a-b)²-4a怎么解?
答
=a[(a-b)²-4]
=a(a-b+2)(a-b-2)
a(a-b)²-4a怎么解?
=a[(a-b)²-4]
=a(a-b+2)(a-b-2)