f(-2)=-2,f(4)=-8

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Solution for f(-2)=-2,f(4)=-8 equation: 



f(-2)=-2.f(4)=-8

We move all terms to the left:

f(-2)-(-2.f(4))=0

We add all the numbers together, and all the variables

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

We multiply parentheses

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

We get rid of parentheses

2f^4-2f=0

We do not support efpression: f^4

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