2a(3次方减3b的二次方)加(负b的二次方加a的三次方)2(7m减3n)减(8m减5n)5(2x减7y)减3(4x减10y)先去括号,再合并同类项
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/19 14:14:03
![2a(3次方减3b的二次方)加(负b的二次方加a的三次方)2(7m减3n)减(8m减5n)5(2x减7y)减3(4x减10y)先去括号,再合并同类项](/uploads/image/z/2584484-44-4.jpg?t=2a%283%E6%AC%A1%E6%96%B9%E5%87%8F3b%E7%9A%84%E4%BA%8C%E6%AC%A1%E6%96%B9%29%E5%8A%A0%28%E8%B4%9Fb%E7%9A%84%E4%BA%8C%E6%AC%A1%E6%96%B9%E5%8A%A0a%E7%9A%84%E4%B8%89%E6%AC%A1%E6%96%B9%EF%BC%892%EF%BC%887m%E5%87%8F3n%EF%BC%89%E5%87%8F%EF%BC%888m%E5%87%8F5n%EF%BC%895%EF%BC%882x%E5%87%8F7y%EF%BC%89%E5%87%8F3%EF%BC%884x%E5%87%8F10y%EF%BC%89%E5%85%88%E5%8E%BB%E6%8B%AC%E5%8F%B7%2C%E5%86%8D%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB%E9%A1%B9)
2a(3次方减3b的二次方)加(负b的二次方加a的三次方)2(7m减3n)减(8m减5n)5(2x减7y)减3(4x减10y)先去括号,再合并同类项
2a(3次方减3b的二次方)加(负b的二次方加a的三次方)
2(7m减3n)减(8m减5n)
5(2x减7y)减3(4x减10y)
先去括号,再合并同类项
2a(3次方减3b的二次方)加(负b的二次方加a的三次方)2(7m减3n)减(8m减5n)5(2x减7y)减3(4x减10y)先去括号,再合并同类项
2a(3次方减3b的二次方)加(负b的二次方加a的三次方)
=2a3-6b2-b2+a3
=3a3-7b2
2(7m减3n)减(8m减5n)
=14m-6n-8m+5n
=6m-n
5(2x减7y)减3(4x减10y)
=10x-35y-12x+30y
=-2x-5y
2a(3次方减3b的二次方)加(负b的二次方加a的三次方)
=2a³-3b²-b²+a³
=3a³-4b²;
2(7m减3n)减(8m减5n)
=14m-6n-8m+5n;
=6m-n
5(2x减7y)减3(4x减10y)
=10x-35y-12x+30y
=-2x-5y;<...
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2a(3次方减3b的二次方)加(负b的二次方加a的三次方)
=2a³-3b²-b²+a³
=3a³-4b²;
2(7m减3n)减(8m减5n)
=14m-6n-8m+5n;
=6m-n
5(2x减7y)减3(4x减10y)
=10x-35y-12x+30y
=-2x-5y;
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