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Mathematics for IGCSE & O level - Algebraic Manipulation (Section 2 - No. 20)

Expand (x - 2)(x + 2)
x² + 4
x² - 4
x² + 4x + 4
x² - 4x + 4

Penjelasan

(x-2)(x+2) = x² + 2x -2x -4 = x² - 4

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