algebra basics, algebra formula, algebra for beginners, math shortcuts, expand (a - b)^2, (a - b) squared identity, binomial expansion, high school math, algebra help, math revision, GCSE algebra, CBSE math, SAT math tricks, math tutorial, learn algebra, math explained, mathematics tricksbr 🎓 Learn the powerful identity: (a - b)² = a² + b² - 2abbr In this video, we break down the formula step-by-step, show you how it works, and why it's important in algebra and beyond! Great for beginners and anyone revising for exams.