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3 May, 14:59

F (x) = 4x2 + 7x - 18

Find f (-9)

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  1. 3 May, 17:36
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    f (-9) = 243

    Step-by-step explanation:

    f (x) = 4x²+7x - 18

    f (-9) = 4 (-9) ²+7 (-9) - 18

    = 4 (81) - 63-18

    = 324 - 81

    = 243
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