Mathematics for IGCSE & O level - Algebraic Manipulation (Section 7 - No. 3)
Which of the following can be factorized using the difference of two squares method?
x² + 9
4x² - 25
x² + 6x + 9
2x² + 8
解释
The difference of two squares is of the form a² - b², therefore it can be used to factorize 4x²-25.