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Mathematics for IGCSE & O level - Algebraic Manipulation (Section 6 - No. 38)

What is the product of (2x + 1) and (x - 3)?
2x^2 - 5x - 3
2x^2 + 5x - 3
2x^2 - 5x + 3
2x^2 + 5x + 3

解释

Using FOIL: (2x + 1)(x - 3) = 2x^2 - 6x + x - 3 = 2x^2 - 5x - 3

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