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f(-2)=4(-2)^4-(-2)^3+3(-2)^2+5(-2)-3
We move all terms to the left:
f(-2)-(4(-2)^4-(-2)^3+3(-2)^2+5(-2)-3)=0
We add all the numbers together, and all the variables
f(-2)-71=0
We multiply parentheses
-2f-71=0
We move all terms containing f to the left, all other terms to the right
-2f=71
f=71/-2
f=-35+1/2
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