The above video shows two method of expanding the expression; using the algebraic expansion (rainbow method) versus the binomial theorem. As you can see, the binomial method is much faster and less prone to make mistakes. For those who are new to binomials, it may seem very alien initially, but with some practice you will be able to do the expansion with ease.
Additional Math – Normal Expansion versus Binomial Theorem.
A-Math Group Tuition at Woodlands, Choa Chu Kang, Yew Tee, Marsiling, Admiralty and Sembawang.