f(-4)=2*(-4^(2))-1

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Solution for f(-4)=2*(-4^(2))-1 equation: 



f(-4)=2(-4^(2))-1

We move all terms to the left:

f(-4)-(2(-4^(2))-1)=0

We add all the numbers together, and all the variables

f(-4)+33=0

We multiply parentheses

-4f+33=0

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

-4f=-33

f=-33/-4

f=8+1/4

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