(2a-5b)(3a^2-2ab+b^2)
问题描述：
(2a-5b)(3a^2-2ab+b^2)
计算,急,
答
(2a - 5b)(3a^2 - 2ab + b^2)
= 6a^3 - 4a^2b + 2ab^2 - 15a^2b + 10ab^2 - 5b^3
= 6a^3 + ( -4a^2b - 15a^2b) + (2ab^2 + 10ab^2) - 5b^3
= 6a^3 - 19a^2b + 12ab^2 - 5b^3