3a-2a²-(-4a+a²+3b)+a²
=3a-2a²+4a-a²-3b+a²
=-2a²+7a-3b
计算3a-2a^2-(-4a+a^2+3b)+a^2
计算3a-2a^2-(-4a+a^2+3b)+a^2
数学人气:894 ℃时间:2020-02-04 03:12:49
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