3倍根号下a3-1-3a2+3a 化简为?

问题描述:

3倍根号下a3-1-3a2+3a 化简为?

3倍根号下a3-1-3a2+3a
=3倍根号下(a-1)(a2+a+1)-3a(a-1)
=3倍根号下(a-1)(a2-2a+1)
=3倍根号下(a-1)^3
=a-1