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20 May, 13:15

Given f (x) = 4x^2-5 and g (x) = x+3. What is (fg) (x) ?

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Answers (2)
  1. 20 May, 14:29
    0
    (fg) (x) = f (g (x)) = 4 (g (x)) ²-5=4 (x+3) ²-5=4x²+24x+31
  2. 20 May, 17:08
    0
    (fg) (x) = f (g (x))

    = 4 (x+3) ^2 - 5

    = 4 (x^2 + 6x + 9) - 5

    = 4x^2 + 24x + 36 - 5

    = 4x^2 + 24x + 31

    answer

    (fg) (x) = 4x^2 + 24x + 31
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