计算:(a³-2a²+a-7)-3a²+1/4a-(2a²-7a)

问题描述:

计算:(a³-2a²+a-7)-3a²+1/4a-(2a²-7a)
要有过程.

(a³-2a²+a-7)-3a²+1/4a-(2a²-7a)
=a³-2a²+a-7-3a²+1/4a-2a²+7a
=a³-7a²+33/4a-7