同类二次根式与同类项是初中代数式的两个重要概念,它们之间既有联系,又有区别,主要表现在: 1．所指对象不同同类二次根式是指几个二次根式之间的关系;而同类项是指几个单项式之间的关系．如: 对于a~(1/2)与b~(1/2)我们可以说它们是不是同类二次 Similar secondary roots and similar items are two important concepts of junior high algebraic algebraic form. There are both connections and differences between them. The main manifestations are as follows: 1. The referents of the same class of secondary roots refer to the relationship between several secondary roots; and the same category refers to the relationship between several monomials. Such as: For a~(1/2) and b~(1/2) we can say whether they are the same kind of quadratic