Algebra EP4 | Special Products & Algebraic Identities | Squares & Difference of Two Squares |

Learn three essential algebraic identities and discover how to recognise special patterns before expanding. In this episode of MathExam Algebra, we study: (a+b)^2=a^2+2ab+b^2 (a-b)^2=a^2-2ab+b^2 (a+b)(a-b)=a^2-b^2 You will see how these identities are formed using expansion and grid multiplication, how to use them in examples, and how to recognise more complicated expressions by treating a group such as \((b+c)\) as one term. We also look at important reminders such as: (3x)^2=9x^2. This lesson is useful for students studying GCSE, GCE and HKDSE Mathematics, as well as anyone who wants to strengthen their algebra skills. MathExam focuses on clear, step-by-step mathematics for examinations. Subscribe to MathExam for more Algebra, Quadratic Equations, Coordinate Geometry and exam-focused mathematics lessons. Chapters From Expansion to a Special Product Square of a Sum Grid Multiplication: \((a+b)^2\) Square of a Difference Comparing the Two Square Identities Difference of Two Squares Example: \((x+5)(x-5)\) Example: \((3x+4)(3x-4)\) Treat a Group as One Term Hidden Grouping Remember Summary #Algebra #AlgebraicIdentities #SpecialProducts #GCSEMaths #HKDSE數學 #代數 #代數恆等式 #數學考試 #mathematics 2026-Oct-09. 2026-10-09