Factorise Algebraically: Common Factor & Difference of Squares

🚨 COMPOSITE FUNCTION PROOFS LOOK HARD… UNTIL YOU SEE THIS METHOD! Most students get stuck on “Show that…” questions because: ❌ They don’t know where to start ❌ They mix up (f(g(x))) and (g(f(x))) ❌ They expand correctly but can’t reach the given answer So they panic… and lose EASY marks in the exam. But here’s the trick 👇 In composite function proofs, the goal is to work step-by-step until your algebra matches the answer they gave you. In this lesson, I show you: ✅ How to substitute one functi