Note: The second expression must be
instead of ![[3+(-7)]+(6)](https://tex.z-dn.net/?f=%5B3%2B%28-7%29%5D%2B%286%29)
Given:
The given expression is:
![-3+[(-7)+(-6)]](https://tex.z-dn.net/?f=-3%2B%5B%28-7%29%2B%28-6%29%5D)
Rahal rewrites the expression as:
![[(-3)+(-7)]+(-6)](https://tex.z-dn.net/?f=%5B%28-3%29%2B%28-7%29%5D%2B%28-6%29)
To find:
The property that Rahal use to rewrite the expression.
Solution:
According to the associative property of addition, if a, b and c are three real numbers, then

We have,
![-3+[(-7)+(-6)]](https://tex.z-dn.net/?f=-3%2B%5B%28-7%29%2B%28-6%29%5D)
Using the associative property of addition, we get
![-3+[(-7)+(-6)]=[(-3)+(-7)]+(-6)](https://tex.z-dn.net/?f=-3%2B%5B%28-7%29%2B%28-6%29%5D%3D%5B%28-3%29%2B%28-7%29%5D%2B%28-6%29)
Therefore, the required property is associative property of addition.