What is the expansion of (5 + 2x)3 ?

2x + 8

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6x + 5

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15x + 6

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15 + 6x

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Solution

The correct option is D 15 + 6x
The expansion of (5 + 2x) 3 = 5 $\times$ 3 + 2x $\times$ 3
= 15 + 6x

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