等式的一个性质的妙用

Usage of Equality's Nature

举例说明了等式的一个性质"在等式的两边分别乘以(或除以)一个相等的非零的数或整式,等式仍成立"在解题中的妙用。

Examples cited are used to explain one nature of equality in solving the problem cleverly: if two parts of equality multiply or divide the same number except zero or whole formula, the new equality will still hold water.