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Mathematics for IGCSE & O level - Algebraic Manipulation (Section 1 - No. 10)

What are the factors of y² - 49?
(y - 7)(y - 7)
(y + 7)(y + 7)
(y + 7)(y - 7)
(y + 24)(y - 2)

설명

y² - 49 is (y-7)(y+7)

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