(3m-1)^2(3m+1)^2(9m^2+1)^2

问题描述:

(3m-1)^2(3m+1)^2(9m^2+1)^2

(3m-1)²(3m+1)²(9m²+1)²=[(3m-1)(3m+1)]²(9m²+1)²=(9m²-1)²(9m²+1)²=[(9m²-1)(9m²+1)]²=(81m⁴-1)²=6561m^8-162m⁴+1m^8表...