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26 March, 16:15

F (x) = - 5x2 - x + 20, find f (3).

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  1. 26 March, 18:07
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    Sub 3 for x

    f (3) = - 5 (3) ^2 - (3) + 20

    f (3) = - 5 (9) - 3+20

    f (3) = - 45+17

    f (3) = - 28
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