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Mathematics for IGCSE & O level - Algebraic Manipulation (Section 6 - No. 32)

Which is the expanded form of (2x + 1)(x - 2)?

2x^2 - 3x - 2

2x^2 - 4x - 2

2x^2 + 3x - 2

2x^2 - 5x + 2

Selitys

2x^2 -4x + x -2 = 2x^2 -3x -2

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