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4 April, 07:18

Express (x - 1) (x + 2) (2x + 2) in standard form

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  1. 4 April, 07:35
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    2x³ + 4x² - 2x - 4

    Step-by-step explanation:

    Expand the first pair of factors then multiply by (2x + 2)

    = (x² + x - 2) (2x + 2) → distribute terms

    = x² (2x + 2) + x (2x + 2) - 2 (2x + 2)

    = 2x³ + 2x² + 2x² + 2x - 4x - 4 (collect like terms)

    = 2x³ + 4x² - 2x - 4 ← in standard form
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