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Mathematics for IGCSE & O level - Algebraic Manipulation (Section 3 - No. 14)
What are the factors of x² - 25?
(x - 5)(x - 5)
(x + 5)(x + 5)
(x + 5)(x - 5)
(x + 10)(x - 5)
Forklaring
x² - 25 is of the form a²-b², therefore (x+5)(x-5)
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