81a的5次方b的5次方-ab

来源:学生学帮网 编辑:学帮网 时间:2024/06/18 03:01:36

81a的5次方b的5次方-ab

81a^5b^5-ab
=ab(81a^4b^4-1)
=ab(9a^2b^2+1)(9a^2b^2-1)
=ab(9a^2b^2+1)(3ab+1)(3ab-1)