Question

Use synthetic substitution to find f(-5) and f (2) for the function.
f(x) = 2x³ – 8x² – 2x + 5
f(-5) =
f(2)=

Answers

  1. Answer:
    f(-5) = -85 and f(2) = -7
    Step-by-step explanation:
    To find f(-5) and f(2), we can simply substitute -5 and 2 into the function in place of the variable x.
    f(-5) = 2(-5)³ – 8(-5)² – 2(-5) + 5 = -50 – 40 + 10 + 5 = -85
    f(2) = 2(2)³ – 8(2)² – 2(2) + 5 = 16 – 32 + 4 + 5 = -7

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