(a^3b-3a^2b^2+2ab^3)/(-1/2ab)

问题描述:

(a^3b-3a^2b^2+2ab^3)/(-1/2ab)
带次方的都是数字

原式=a^3b/(-1/2ab)-3a^2b^2/(-1/2ab)+2ab^3/(-1/2ab)
=-2a⁴b²+6a²b³-4a²b⁴