find the coeficcient a of the term in the expansion of the binomial

Question

Binomial             term

(x^2+8)^8             ax^4

 

Answer 1

The binomal is ( x ²+ 8 ) ⁸

Where x  = x ² , y = 8 and n = 8.

x ⁴ coficcient of the term above the expansion.

So,

Substitute the r  value in

.