Formula
(a + b)^n = Σ C(n, k) a^(n-k)b^k
Each term uses a binomial coefficient and powers of a and b.
Example
(x + 2)^3 = x³ + 6x² + 12x + 8
FAQs
What is a binomial coefficient?
It is the number of ways to choose k items from n, written C(n, k).
Can the power be large?
Yes, the formula works for any non-negative integer power.