F(3x)=3x^2+9

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Solution for F(3x)=3x^2+9 equation: 



(3F)=3F^2+9

We move all terms to the left:

(3F)-(3F^2+9)=0

We get rid of parentheses

-3F^2+3F-9=0

a = -3; b = 3; c = -9;
Δ = b2-4ac
Δ = 32-4·(-3)·(-9)
Δ = -99
Delta is less than zero, so there is no solution for the equation

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