Binomial expansion...help me pls

By the binomial theorem,

The term occurs for i = 2, and the term for i = 3. If the coefficient of the squared term is 3 times larger than the coefficient of the cubed term, then

Solve for k :

Since k ≠ 0, it follows that

k - (n - 2) = 0

or

k = n - 2

as required.

a

step-by-step explanation:

u take $30 minus $24. the answer/original($30)