关于二次根式的定义二次根式定义:一般地,形如√ā(a≥0)的代数式叫做二次根式.因为√ā(a≥0)是一个非负数,那是不是就是说二次根式就一定是非负数?那么形如-√ā(a≥0)(如-√
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![关于二次根式的定义二次根式定义:一般地,形如√ā(a≥0)的代数式叫做二次根式.因为√ā(a≥0)是一个非负数,那是不是就是说二次根式就一定是非负数?那么形如-√ā(a≥0)(如-√](/uploads/image/z/1379785-49-5.jpg?t=%E5%85%B3%E4%BA%8E%E4%BA%8C%E6%AC%A1%E6%A0%B9%E5%BC%8F%E7%9A%84%E5%AE%9A%E4%B9%89%E4%BA%8C%E6%AC%A1%E6%A0%B9%E5%BC%8F%E5%AE%9A%E4%B9%89%EF%BC%9A%E4%B8%80%E8%88%AC%E5%9C%B0%2C%E5%BD%A2%E5%A6%82%E2%88%9A%C4%81%EF%BC%88a%E2%89%A50%EF%BC%89%E7%9A%84%E4%BB%A3%E6%95%B0%E5%BC%8F%E5%8F%AB%E5%81%9A%E4%BA%8C%E6%AC%A1%E6%A0%B9%E5%BC%8F.%E5%9B%A0%E4%B8%BA%E2%88%9A%C4%81%EF%BC%88a%E2%89%A50%EF%BC%89%E6%98%AF%E4%B8%80%E4%B8%AA%E9%9D%9E%E8%B4%9F%E6%95%B0%2C%E9%82%A3%E6%98%AF%E4%B8%8D%E6%98%AF%E5%B0%B1%E6%98%AF%E8%AF%B4%E4%BA%8C%E6%AC%A1%E6%A0%B9%E5%BC%8F%E5%B0%B1%E4%B8%80%E5%AE%9A%E6%98%AF%E9%9D%9E%E8%B4%9F%E6%95%B0%3F%E9%82%A3%E4%B9%88%E5%BD%A2%E5%A6%82%EF%BC%8D%E2%88%9A%C4%81%EF%BC%88a%E2%89%A50%EF%BC%89%EF%BC%88%E5%A6%82%EF%BC%8D%E2%88%9A)
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