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25 June, 14:18

Which of the following functions is quadratic?

f (x) = 5^2

f (x) = 3 (x-4) (x+3)

f (x) = 2/3

f (x) = 2x^3+3x^2-5

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  1. 25 June, 14:23
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    f (x) = 3 (x-4) (x+3)

    Step-by-step explanation:

    Quadratic function follows the f (x) = ax^2 + bx+c pattern

    f (x) = 3 (x-4) (x+3) after multiplying out is equal to

    f (x) = (3x-12) (x+3) = (3x^2+9x-12x-36) = (3x^2-3x-36)

    f (x) = (3x^2-3x-36)

    where

    a = 3

    b = - 3

    c = - 36
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