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数学
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(3a^2+2a+1)-(2a^2+3a-5)怎么做啊
人气:232 ℃ 时间:2020-04-01 02:35:21
解答
后面那个括号分配那个负号
=3a^2+2a+1-2a^2-3a+5
=a^2(3-2)+a(2-3)+(1+5)
=a^2-a+6
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