


Use this technique when factorising quadratic expressions where the coefficient of x squared is one. Split the middle term by finding two numbers that multiply to the constant and add to the linear coefficient. Write the factors in brackets based on the cross-multiplication results to complete the expression.
This method applies when you have two perfect squares separated by a subtraction sign. The formula is a squared minus b squared equals a plus b times a minus b. Ensure both terms are perfect squares before applying this specific algebraic pattern.
Start by looking for the highest common factor shared by all terms in the expression. Divide each term by this common factor and write the result inside the brackets. This simplifies the expression significantly and is the first step in most factorisation problems.