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17 February, 08:53

If f (x) = 2x2 - 5 and g (x) = x2 - 4x - 8, find (f - g) (x).

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  1. 17 February, 08:54
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    = x^2 + 4x + 3

    Step-by-step explanation:

    f (x) = 2x^2 - 5

    g (x) = x^2 - 4x - 8

    (f - g) (x) = 2x^2 - 5 - (x^2 - 4x-8)

    Distribute the minus sign

    = 2x^2 - 5 - x^2 + 4x+8

    Combine like terms

    = x^2 + 4x + 3
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