Mathematics for IGCSE & O level - Equations (Section 3 - No. 16)
What type of equations can often be solved using the difference of squares method?
Equations with a perfect square minus another perfect square.
Equations with a plus sign between two squares.
Equations that contain only x.
Equations with three terms.
Paliwanag
This method applies when you have an expression that's a perfect square, minus another perfect square.