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> 计算或化简（1）（x2-xm）÷x2m（2）30-2-3+(-3)2-(14)-1（3）（-a2）3+（-a3）2-a2-a3（4）（x+1）（x-1）+x（2-x）（5）4（x+y）2-x（2y+x
计算或化简（1）（x2-xm）÷x2m（2）30-2-3+(-3)2-(14)-1（3）（-a2）3+（-a3）2-a2-a3（4）（x+1）（x-1）+x（2-x）（5）4（x+y）2-x（2y+x
题目简介
计算或化简（1）（x2-xm）÷x2m（2）30-2-3+(-3)2-(14)-1（3）（-a2）3+（-a3）2-a2-a3（4）（x+1）（x-1）+x（2-x）（5）4（x+y）2-x（2y+x
题目详情
计算或化简
（1）（x
2
-x
m
）÷x
2m
（2）
3
0
-
2
-3
+(-3
)
2
-(
1
4
)
-1
（3）（-a
2
）
3
+（-a
3
）
2
-a
2
-a
3
（4）（x+1）（x-1）+x（2-x）
（5）4（x+y）
2
-x（2y+x）-3（x
2
）
2
（6）（y-x）
2
（x-y）+（x-y）
3
+2（x-y）
2
（y-x）
题型：解答题
难度：中档
来源：不详
答案
（1）原式=x2-2m-x-m；
（2）原式=1-
class="stub"1
8
+9-4
=5
class="stub"7
8
；
（3）原式=-a6+a6-a5
=-a5；
（4）原式=x2-1+2x-x2
=2x-1；
（5）原式=4x2+8xy+4y2-2xy-2x2-3x4
=2x2+6xy+4y2-3x4；
（6）原式=（x-y）3+（x-y）3-2（x-y）3
=0．
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题目简介
计算或化简（1）（x2-xm）÷x2m（2）30-2-3+(-3)2-(14)-1（3）（-a2）3+（-a3）2-a2-a3（4）（x+1）（x-1）+x（2-x）（5）4（x+y）2-x（2y+x
题目详情
（1）（x2-xm）÷x2m
（2）30-2-3+(-3)2-(
（3）（-a2）3+（-a3）2-a2-a3
（4）（x+1）（x-1）+x（2-x）
（5）4（x+y）2-x（2y+x）-3（x2）2
（6）（y-x）2（x-y）+（x-y）3+2（x-y）2（y-x）
答案
（2）原式=1-
=5
（3）原式=-a6+a6-a5
=-a5；
（4）原式=x2-1+2x-x2
=2x-1；
（5）原式=4x2+8xy+4y2-2xy-2x2-3x4
=2x2+6xy+4y2-3x4；
（6）原式=（x-y）3+（x-y）3-2（x-y）3
=0．