Mathematics for IGCSE & O level - Algebraic Manipulation (Section 4 - No. 27)

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

5x² + 7x - 6

5x² - 7x - 6

5x² - 13x - 6

5x² + 13x - 6

解释

(x+2)(5x-3)=5x²-3x+10x-6 = 5x²+7x-6

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