Mathematics for IGCSE & O level - Algebraic Manipulation (Section 1 - No. 6)
If expanding a pair of brackets gives x² - 4x + 4, which of the following could be one of the pair of brackets?
(x - 2)
(x+2)
(x-2) and (x+2)
(x-2) and (x-2)
Giải thích
(x-2)(x-2) = x²-4x+4