Mathematics for IGCSE & O level - Equations (Section 6 - No. 18)
What are the key steps when factorizing x² - 9?
Recognizing it as a difference of squares.
Applying the formula a²-b²= (a-b)(a+b).
Identifying the square roots of the terms.
Setting each factor equal to zero and solving.
Giải thích
The core steps for difference of squares factorization.