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> 化简:(7-5)2000·(-7-5)2001=______________.-九年级数学
化简:(7-5)2000·(-7-5)2001=______________.-九年级数学
题目简介
化简:(7-5)2000·(-7-5)2001=______________.-九年级数学
题目详情
化简:(7-5
)
2000
·(-7-5
)
2001
=______________.
题型:填空题
难度:中档
来源:不详
答案
本题可将(-7-5
)2001写成(-5
-7)2000(-7-5
),然后再根据二次根式的乘法法则进行求解.
解:原式=(7-5
)2000?(-7-5
)2000(-7-5
)=[(-5
+7)(-5
-7)]2000(-7-5
)=(-1)2000(-7-5
)=-7-5
.
正确运用二次根式乘法公式、积的乘方法则、平方差公式等知识是解答问题的关键.
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题目简介
化简:(7-5)2000·(-7-5)2001=______________.-九年级数学
题目详情
答案
解:原式=(7-5
正确运用二次根式乘法公式、积的乘方法则、平方差公式等知识是解答问题的关键.