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Mathematics for IGCSE & O level - Algebraic Manipulation (Section 7 - No. 23)

What is the factored form of 4x^2 - 16?
(2x - 4)(2x - 4)
(2x+4)(2x-4)
(4x - 4)(x + 4)
(4x+4)(x-4)

Обяснение

Difference of squares: 4(x^2-4) = (2x+4)(2x-4)

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