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Mathematics for IGCSE & O level - Algebraic Manipulation (Section 7 - No. 21)

What is the expanded form of (x - 2)(x - 3)?
x^2 - 5x + 6
x^2 + 5x + 6
x^2 - x - 6
x^2 + x - 6

解释

Using FOIL: x^2 - 3x - 2x + 6 = x^2 -5x + 6

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