The second term of the expansion is
.
Solution:
Given expression:

To find the second term of the expansion.

Using Binomial theorem,

Here, a = a and b = –b

Substitute i = 0, we get

Substitute i = 1, we get

Substitute i = 2, we get

Substitute i = 3, we get

Substitute i = 4, we get

Therefore,



Hence the second term of the expansion is
.
Answer:

Step-by-step explanation:
![[-5+(-7)]^2-(7+3)^2](https://tex.z-dn.net/?f=%5B-5%2B%28-7%29%5D%5E2-%287%2B3%29%5E2)
Resolving Parenthesis

=> 44
Answer:
Step-by-step explanation:
√x^72 = √(x^36)^2 = x^36
The area is just the dimensions multiplied, so multiply 7 by 18 and you get 126.