《代数》第十一章第6节（二次根式的混合运算）已向同学们介绍了分母有理化的方法．分母有理化在化商、求值、解方程中都有着广泛应用．本文将要介绍的分子有理化也有很好的应用价值．下面结合实例谈谈分子或分母有理化在解题中的应用，供同学们参考．一、巧用分子有理化比较大 The eleventh chapter of the “Algebra” section 6 (the mixed operation of the secondary roots) has introduced to the students the method of denominator rationalization. Denominator rationalization has been widely used in chemical quotient, evaluation, and solution equations. The rationalization of the molecules that this article will introduce also has a good application value. The following examples will be used to discuss the application of the numerator or denominator in solving problems. First, the rational use of molecules is relatively large