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                            ## 同類項的定義
> 單項式所函的字母相同，相同字母的指數也相同

> 滿足以上兩點就能進行系數（單項式字母前面的因數）的合并

&nbsp;
&nbsp;

## 合并同類項
>step1， 先找到同類項
>step2， 在移項（把同類項放在一塊方便運算）
>step3， 最后合并

&nbsp;

### 去括號
> 在合并同時如果出現括號，要先去括號

![](https://box.kancloud.cn/d8ee4e485cab656862e9f1659205cdd5_691x322.png)
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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