Question 01 Form 5 Expand \((x + 3y)^3\) Show Solution \(\color{blue}(a + b)^3 = a^3 + 3a^2b + 3ab^2 + b^3\) \(\text{Let, }\) \(a = x\) \(b = 3y\) \begin{equation*} \begin{split} (x + 3y)^3& = x^3 + 3(x)^2(3y) + 3x(3y)^2 + (3y)^3\\\\ (x + 3y)^3& = x^3 + 9x^2y + 27xy^2 + 27y^3 \end{split} \end{equation*} Basic Concept (Prev Lesson) (Next Lesson) Question 02 Kembali ke Form 5