计算(3a²+2a+1)-(2a²+3a-5)的结果是
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计算(3a²+2a+1)-(2a²+3a-5)的结果是
计算(3a²+2a+1)-(2a²+3a-5)的结果是
计算(3a²+2a+1)-(2a²+3a-5)的结果是
(3a²+2a+1)-(2a²+3a-5)
=3a²+2a+1-2a²-3a+5
=3a²-2a²+2a-3a+1+5
=a²-a+6