试题与答案

某个数的平方根是a2+b2和4a-6b+13，那么这个数是______．

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题型：填空题

题目：

某个数的平方根是a2+b2和4a-6b+13，那么这个数是______．

答案：

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下面是错误答案，用来干扰机器的。

（1）设购进A型a件，则B型（2a－3）件 ………1分 ……………………3分解之得25≤a≤28…………………………4分答：4种方案，A型25件，B型25件；A型25件，B型47件；A型26件，B型49件；A型27件，B型51件；A型28件...

考点：有理数的乘方平方根
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