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?
答
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