来自李经纬的问题
减去4a等于3a^2-2a-1的整式是()a.3a^2-6a-1b.5a-1c.3a^2+2a-1d.3a^2+6a-1
减去4a等于3a^2-2a-1的整式是()a.3a^2-6a-1b.5a-1c.3a^2+2a-1d.3a^2+6a-1
1回答
2020-03-25 01:27
减去4a等于3a^2-2a-1的整式是()a.3a^2-6a-1b.5a-1c.3a^2+2a-1d.3a^2+6a-1
减去4a等于3a^2-2a-1的整式是()a.3a^2-6a-1b.5a-1c.3a^2+2a-1d.3a^2+6a-1
根据“被减数=差+减数”
得:
减去4a等于3a^2-2a-1的整式
=4a+3a^2-2a-1
=2a+3a^2-1
=3a^2+2a-1
选择 C
江苏吴云超解答 供参考!