Mathematics for IGCSE & O level - Algebraic Manipulation (Section 4 - No. 4)

What is the result of expanding (3x + 2)(x - 5)?

3x² - 13x - 10

3x² - 15x - 10

3x² + 17x - 10

3x² - 13x + 10

解释

(3x + 2)(x - 5) = 3x² -15x+2x-10= 3x² -13x-10

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