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Mathematics for IGCSE & O level - Algebraic Manipulation (Section 3 - No. 8)

What is the factored form of 10x + 15?
5(2x + 3)
2(5x + 7.5)
x(10 + 15)
5x + 10

解释

10x + 15 = 5(2x + 3)

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