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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

f(-4)+12=0

We multiply parentheses

-4f+12=0

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

-4f=-12

f=-12/-4

f=+3

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