This worksheet may help you know about how to expand (a + b) n and find formula. The binomial theorem is used to expand the formula. It is possible to expand the power (a + b)n by using Pascal's Triangle Equation. Here we explain how to expand the (a + b)n.
Step1: Make the triangle shape by using 1 on the exterior part of the triangle.
Step2: The below values are coefficient of A & B. The power of A is decreases from n to 0 & the power of B is increases from 0 to n.
(a + b) 1 1
(a + b)2 1 2 1
(a + b) 3 1 3 3 1
(a + b) 4 1 4 6 4 1
And so on.