若a²-a+1=0,则2a³-a²+a+3=?
问题描述:
若a²-a+1=0,则2a³-a²+a+3=?
答
结果等于2.
2a³-a²+a+3=a³+a³-a²+a+3=a³+3=a²-a+3=a²-a+1+2=2