(i) expand by using standard formulas (x + 2)^3
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Step-by-step explanation:
(x + 2)³
=> x³ + 2³ + 3 × x × 2(x + 2)
=> x³ + 8 + 6x(x + 2)
=> x³ + 8 + 6x² + 12x
=> x³ + 6x² + 12x + 8
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