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16 September, 14:57

Evaluate the function for x = - 4c if c = - 2.

f (x) = - 3^2 - 4x

A.

-160

B.

-256

C.

-224

D.

160

+2
Answers (1)
  1. 16 September, 15:26
    0
    x = - 4c

    if c = - 2 then x = - 4 (-2) = 8

    I believed you had a typo, function should be f (x) = - 3x^2 - 4x

    so

    f (x) = - 3x^2 - 4x

    f (x) = - 3 (8^2) - 4 (8)

    f (x) = - 3 (64) - 32

    f (x) = - 192 - 32

    f (x) = - 224

    answer

    C.

    -224
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