f(-2)=3^-2

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Solution for f(-2)=3^-2 equation: 



f(-2)=3^-2

We move all terms to the left:

f(-2)-(3^-2)=0

We add all the numbers together, and all the variables

f(-2)-0.11111111111111=0

We multiply parentheses

-2f-0.11111111111111=0

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

-2f=0.11111111111111

f=0.11111111111111/-2

f=-0.11111111111111/2

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