a,b,c分别是144,169,196的算术平方根,求a方+b方+c方+2ab-2ac-2bc的值及它的平方根和算术平方根尽可能的简便,我会非常感谢您的,提前说一声:”
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![a,b,c分别是144,169,196的算术平方根,求a方+b方+c方+2ab-2ac-2bc的值及它的平方根和算术平方根尽可能的简便,我会非常感谢您的,提前说一声:”](/uploads/image/z/5916504-48-4.jpg?t=a%2Cb%2Cc%E5%88%86%E5%88%AB%E6%98%AF144%2C169%2C196%E7%9A%84%E7%AE%97%E6%9C%AF%E5%B9%B3%E6%96%B9%E6%A0%B9%2C%E6%B1%82a%E6%96%B9%2Bb%E6%96%B9%2Bc%E6%96%B9%2B2ab-2ac-2bc%E7%9A%84%E5%80%BC%E5%8F%8A%E5%AE%83%E7%9A%84%E5%B9%B3%E6%96%B9%E6%A0%B9%E5%92%8C%E7%AE%97%E6%9C%AF%E5%B9%B3%E6%96%B9%E6%A0%B9%E5%B0%BD%E5%8F%AF%E8%83%BD%E7%9A%84%E7%AE%80%E4%BE%BF%2C%E6%88%91%E4%BC%9A%E9%9D%9E%E5%B8%B8%E6%84%9F%E8%B0%A2%E6%82%A8%E7%9A%84%2C%E6%8F%90%E5%89%8D%E8%AF%B4%E4%B8%80%E5%A3%B0%EF%BC%9A%E2%80%9D)
a,b,c分别是144,169,196的算术平方根,求a方+b方+c方+2ab-2ac-2bc的值及它的平方根和算术平方根尽可能的简便,我会非常感谢您的,提前说一声:”
a,b,c分别是144,169,196的算术平方根,求a方+b方+c方+2ab-2ac-2bc的值及它的平方根和算术平方根
尽可能的简便,我会非常感谢您的,提前说一声:”
a,b,c分别是144,169,196的算术平方根,求a方+b方+c方+2ab-2ac-2bc的值及它的平方根和算术平方根尽可能的简便,我会非常感谢您的,提前说一声:”
a方+b方+c方+2ab-2ac-2bc这个式子=(a+b-c)方
a=12,b=13,c=14没问题了吧?
羡慕你啊,虽然有暑假作业要做,但最起码你们可以放那么长时间的假,我们明天就要上学了啊!
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a方+b方+c方+2ab-2ac-2bc
=(a+b)方+c方-2c(a+b)
=(a+b-c)方
由a,b,c分别是144,169,196的算术平方根知:
a=12,b=13,c=14
(a+b-c)方=(12+13-14)方=121