GCSE Maths - What is Difference of Two Squares (DOTS) #39

The video tutorial introduces the difference of two squares technique for factorizing expressions. It explains that this method applies to expressions of the form A^2 - B^2 and demonstrates how to factorize them into (A + B)(A - B). The tutorial provides several examples, including X^2 - 25, 49 - P^2, 16X^2 - 9Y^2, 36 - 4X^2, and P^2 - 25Q^2, showing step-by-step how to identify the squared terms and apply the technique. The video concludes by verifying the factorization through expansion, ensuring the method's correctness.

What are the square roots of the terms in the expression 16X^2 - 9Y^2?

Explain how to factor the expression 36 - 4X^2 using the difference of squares technique.

What should happen when you expand the brackets after factorising an expression using this technique?