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15 March, 09:41

Let f (x) = x+7 and g (x) = x-4. Find f (x) times g (x)

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  1. 15 March, 13:40
    0
    x² + 3x - 28

    Step-by-step explanation:

    We need f (x) * g (x), or

    (x + 7) (x - 4)

    Use FOIL to multiply, Foil is Firsts, Outsides, Insides, Lasts. It tells you the terms to multiply together ...

    Firsts: x (x) = x²

    Outsides: x (-4) = - 4x

    Insides: 7 (x) = 7x

    Lasts: (7) (-4) = - 28

    So we have

    x² - 4x + 7x - 28

    simplify to

    x² + 3x - 28
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