因式分解:a³+a²-a-1
问题描述:
因式分解:a³+a²-a-1
答
a³+a²-a-1
=a^2(a+1)-(a+1)
=(a+1)(a^2-1)
=(a+1)^2(a-1)
答
a^2(a+1)-(a+1)
=(a+1)(a^2-1)
=(a+1)(a+1)(a-1)
答
因式分解:
a³+a²-a-1
=(a^3-a)+(a^2-1)
=a(a^2-1)+(a^2-1)
=(a^2-1)(a+1)
=(a-1)(a+1)^2
答
a³+a²-a-1
=a²(a+1)-(a+1)
=(a+1)(a²-1)
=(a+1)²(a-1)
答
原式=(a³-1)+(a²-a)
=(a-1)(a²+a+1)+a(a-1)
=(a-1)(a²+2a+1)
=(a-1)(a+1)²