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7 January, 12:22

2. If f (x) = x - 5 and g (x) = x2 + 3, find f[g (-2) ].

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Answers (2)
  1. 7 January, 12:24
    0
    Answer: 2

    Step-by-step explanation:

    F (x) = X-5

    G (x) = X2 + 3

    Find F (g (-2))

    G (x) = x2 + 3

    G (x) = G (-2);

    X = - 2

    Substitute for x in g equation

    G (-2) = (-2) ^2+3

    =4+3

    =7

    Therefore G (-2) = 7

    F (g (-2)) = x-5

    Substitute for g (-2) = 7

    F (7) = 7-5

    =2
  2. 7 January, 12:42
    0
    = 2

    Step-by-step explanation:

    # g (x) = x^2 + 3 hence g (-2) = (-2) 2+3=4+3=7

    and so f (g (-2)) = f (7) = 7 - 5 = 2
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