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Given f(x) = 4x3 − 12x2 + 40x + 12, find f(–2).
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Given f(x) = 4x3 − 12x2 + 40x + 12, find f(–2).

User John Tyree
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1 Answer

3 votes

Hey there! :)

Answer:

f(-2) = -148.

Explanation:

To calculate f(-2), simplify substitute -2 for x in the equation. Therefore:

f(x) = 4x³ -12x² + 40x + 12

Becomes:

f(-2) = 4(-2)³ - 12(-2)² + 40(-2) + 12

Simplify:

f(-2) = 4(-8) - 12(4) - 80 + 12

f(-2) = -32 - 48 -80 + 12

Finally, you get:

f(-2) = -148.

User FutureNerd
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