Mathematics for IGCSE & O level - Algebraic Manipulation (Section 1 - No. 7)
If an expression can be written in the form of a² - b², which method can be applied?
Factoring by grouping
The difference of squares
Completing the square
Factoring by trial and error
Explicació
An expression in the form of a² - b² can be factored using the difference of squares method, resulting in (a + b)(a - b).