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> 计算:(a-1+4aa-1)(1+a-4aa+1).-数学
计算:(a-1+4aa-1)(1+a-4aa+1).-数学
题目简介
计算:(a-1+4aa-1)(1+a-4aa+1).-数学
题目详情
计算:
(a-1+
4a
a-1
)(1+a-
4a
a+1
)
.
题型:解答题
难度:中档
来源:不详
答案
原式=
(a-1
)
2
+4a
a-1
•
(a+1
)
2
-4a
a+1
=
(a+1
)
2
a-1
•
(a-1
)
2
a+1
=(a+1)(a-1)
=a2-1.
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题目简介
计算:(a-1+4aa-1)(1+a-4aa+1).-数学
题目详情
答案
=
=(a+1)(a-1)
=a2-1.