(2a的2次方-2/3-4/9)(-9a)

问题描述:

(2a的2次方-2/3-4/9)(-9a)


(2a²-2/3-4/9)×(-9a)
=[2a²×(-9a)]-[2/3×(-9a)]-[4/9×(-9a)]
=-18a³+6a+4a
=-18a³+10a