(4a+3a²-3-3a²)-(-a+4a³)
=4a+3a²-3-3a²+a-4a³
=-4a³+3a²-3a²+4a+a-3
=-4a³+5a-3
=-4*(-2)³+5*(-2)-3
=32-10-3
=19
(4a+3a²-3-3a²)-(-a+4a³)等于多少!要带步骤!
(4a+3a²-3-3a²)-(-a+4a³)等于多少!要带步骤!
a=-2
a=-2
数学人气:654 ℃时间:2020-02-06 00:24:10
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