Mathematics for IGCSE & O level - Equations (Section 2 - No. 1)
In factorization, what is the next step when you have an equation like x² - 9 = 0?
Use the quadratic formula.
Factor by the method 'difference of two squares'.
Use the method of completing the square.
Multiply by -1
Explication
The equation can be factorized using the difference of two squares.