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f(-1)=0.17
We move all terms to the left:
f(-1)-(0.17)=0
We add all the numbers together, and all the variables
f(-1)-0.17=0
We multiply parentheses
-1f-0.17=0
We move all terms containing f to the left, all other terms to the right
-f=0.17
f=0.17/-1
f=-0.17/1
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