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> 请写出一个式子,使它与的积不含二次根式-九年级数学
请写出一个式子,使它与的积不含二次根式-九年级数学
题目简介
请写出一个式子,使它与的积不含二次根式-九年级数学
题目详情
请写出一个式子,使它与
的积不含二次根式
题型:填空题
难度:中档
来源:不详
答案
如
(答案不惟一)
根据分母有理化的定义解答即可.
解:答案不唯一,举例:
如:(4-
)×(4+
)
=16-3
=13,
故答案为4-
.
本题考查了分母有理化,分母有理化常常是乘二次根式本身(分母只有一项)或与原分母组成平方差公式.
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132-122+196-24-数学
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化简:(1)27-28-613+18;(2)2bab2÷6ab
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题目简介
请写出一个式子,使它与的积不含二次根式-九年级数学
题目详情
答案
解:答案不唯一,举例:
如:(4-
=16-3
=13,
故答案为4-
本题考查了分母有理化,分母有理化常常是乘二次根式本身(分母只有一项)或与原分母组成平方差公式.