用英文表述等式的性质

发布网友发布时间：2022-04-23 17:39

共2个回答

热心网友时间：2023-10-11 11:01

Equations containing the equal sign are called equations (mathematical terms).
Form: Connect two equal numbers (or numbers represented by letters) with "=".
The equations can be divided into contradictory equations and conditional equations. The contradiction equation is the "equal" where the two sides are not equal. That is, an equation that is not established, such as 5+2=8, and 5+2=7, so 5+2=8 is a contradiction equation. Some formulae cannot judge whether or not they are contradictory equations. For example, x-9=2. This equation is valid only when x=11 (such an equation is called a conditional equation). When x≠11, this equation is a contradiction, etc. formula. Conditional equations refer to a number of equal relationships. The equations learned in algebra are all conditional equations.

热心网友时间：2023-10-11 11:02

含有等号的式子叫做等式，等式可分为恒等式和条件等式。等式两边同时加上（或减去）同一个整式，或者等式两边同时乘或除以同一个不为0的整式，等式仍然成立。
形式：把相等的两个数（或字母表示的数）用“=”连接起来。
等式可分为恒等式和条件等式。恒等式，是无论其变量如何取值，永远成立的等式，比如5+2=7就是恒等式，有些式子无法判断是不是恒等式，,比如x-9=2，只有x=11时这个等式才成立，这样的等式叫做条件等式。
一、等式性质一。
等式两边同时加上(或减去)同一个整式，等式仍然成立。
若a=b
那么a+c=b+c

二、等式性质二。
等式两边同时乘或除以同一个不为0的整式，等式仍然成立。
若a=b
那么有a·c=b·c
或a÷c=b÷c （c≠0）
等式的性质是解方程的基础，很多解方程的方法都要运用到等式的性质。如移项，运用了等式的性质1；去分母，运用了等式的性质2。
运用等式的性质，涉及除法时，要注意转换后，除数不能为0，否则无意义
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