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10 June, 11:12

F (x) = 2x+7

G (x) = 3x^2-1

Which expression represents f (g (x)) ?

A 6x^2+5

B 6x^2 + 12

C 3x^2-2x-8

D 3x^2 + 2x+6

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Answers (1)
  1. 10 June, 13:32
    0
    F (x) = 2x + 7

    g (x) = 3x² - 1

    f (g (x)) = 2 (3x² - 1) + 7

    f (g (x)) = 2 (3x²) - 2 (1) + 7

    f (g (x)) = 6x² - 2 + 7

    f (g (x)) = 6x² + 5

    The answer is A.
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