问题
计算题
先化简再求值：4x（x2+x+1）﹣2（2x﹣1）﹣2x2，其中x=﹣2．
答案
解：4x（x2+x+1）﹣2（2x﹣1）﹣2x2
当x=﹣2时，代入
原式=4×（﹣2）3+2×（﹣2）2+2=﹣22
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先化简再求值：4x（x2+x+1）﹣2（2x﹣1）﹣2x2，其中x=﹣2．
解：4x（x2+x+1）﹣2（2x﹣1）﹣2x2
当x=﹣2时，代入
原式=4×（﹣2）3+2×（﹣2）2+2=﹣22
| 综合填空。 根据短文内容选择方框中的单词并用其适当形式填空，每空填一词，每词限用一次。 | |
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