f(-4)=(-4)2-64

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Solution for f(-4)=(-4)2-64 equation: 



f(-4)=(-4)2-64

We move all terms to the left:

f(-4)-((-4)2-64)=0

We add all the numbers together, and all the variables

f(-4)+72=0

We multiply parentheses

-4f+72=0

We move all terms containing f to the left, all other terms to the right

-4f=-72

f=-72/-4

f=+18

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