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23 July, 15:24

F (x) = 5x + 21x² - 21x-5; x+5

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  1. 23 July, 15:28
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    is 36 (x) im not sure if x should be there

    Step-by-step explanation:

    I am not sure but i hope it's right

    f (x) = 5x+21x^2-21x-5; x+5 first you simplify

    F (x) = 6x^2

    F (x) = 36
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