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14 July, 06:03

1. if f (x) = - 4x^2+15, then f (-3) =

2. if (x) = 3x-2, find f (8) - f (-5)

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Answers (1)
  1. 14 July, 09:03
    0
    1. - 4 (3) ^2+15

    -4 (9) + 15

    -36+15

    -21<-

    2. 3 (8) - 2

    24-2

    22

    3 (-5) - 2

    -15-2

    -17

    22 - (-17)

    39 <-
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