a²-3a-ab+3b=
问题描述:
a²-3a-ab+3b=
答
原式=(a²-3a)-(ab-3b)
=a(a-3)-b(a-3)
=(a-3)(a-b)
a²-3a-ab+3b=
原式=(a²-3a)-(ab-3b)
=a(a-3)-b(a-3)
=(a-3)(a-b)