a³-a²-2a是直接提取公因式吗?
问题描述:
a³-a²-2a是直接提取公因式吗?
答
对,
=a(a^2-a-2)
=a(a-2)(a+1)
a³-a²-2a是直接提取公因式吗?
对,
=a(a^2-a-2)
=a(a-2)(a+1)