Answer:
The two expressions A and B are equivalent because the value of both expressions is same.
Explanation:
Given: Expression A is 5(4+9) and expression B is 29+36.
To find: The reason why expressions A and B are equivalent.
First we solve expression A.
(using
)
⇒

⇒

Now we solve expression B.

Clearly, the value of both the expressions is same.
Hence, the expression A is equivalent to expression B.