平方根和算术平方根是两个重要概念 ,它们之间很容易混淆 ,只有注意它们之间的区别和联系 ,才能更好地应用它们解题。一、区别1.定义不同 :如果 x2 =a,那么 x就叫做 a的平方根 ;如果 x2= a,且 x≥ 0 ,那么 x叫做 a的算术平方根。2 .个数不同 :一个正数的平方根有两个 ;一个正数 The square root and the square root of arithmetic are two important concepts, and they are easily confusing. Only by paying attention to the differences and relations between them, can they be better applied. First, the difference 1. Different definitions: If x2 = a, then x is called the square root of a; if x2 = a, and x ≥ 0, then x is called the arithmetic square root of a. 2. The number is different: There are two square roots of a positive number; a positive number