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f(-2)=4.f(-3)=1
We move all terms to the left:
f(-2)-(4.f(-3))=0
We multiply parentheses
-2f-(4.f(-3))=0
We calculate terms in parentheses: -(4.f(-3)), so:We get rid of parentheses
4.f(-3)
We multiply parentheses
-12f
Back to the equation:
-(-12f)
-2f+12f=0
We add all the numbers together, and all the variables
10f=0
f=0/10
f=0
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