Step 1:
The general term of a binomial expansion $(a+b)^n$ is given by the formula:
$$T_{r+1} = ^nC_r \cdot a^{n-r} \cdot b^r$$
where $T_{r+1}$ is the $(r+1)$th term, $^nC_r$ is the binomial coefficient, and $r$ is the term number minus 1.
Show more…