因式分解:0.04-a²+2a³-4的四次方
问题描述:
因式分解:0.04-a²+2a³-4的四次方
答
错了
是0.04-a²+2a³-a⁴
=0.04-(a²-2a³+a⁴)
=0.2²-(a-a²)²
=[0.2+(a-a²)][0.2-(a-a²)]
=-(a²-a-0.2)(a²-a+0.2)