f(9)=9^2+9(9)-9

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Solution for f(9)=9^2+9(9)-9 equation: 



f(9)=9^2+9(9)-9

We move all terms to the left:

f(9)-(9^2+9(9)-9)=0

We add all the numbers together, and all the variables

f^9-171=0

We do not support efpression: f^9

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