Sign In

Mathematics for IGCSE & O level - Algebraic Manipulation (Section 4 - No. 17)

Which expression is an example of the difference of two squares?
x² + 4
x² - 9
x² + 6x + 9
(x + 2)²

Explanation

x² - 9 can be written as (x+3)(x-3)

Comments (0)

Advertisement