F(-4)=3x^2-2x

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Solution for F(-4)=3x^2-2x equation: 



(-4)=3F^2-2F

We move all terms to the left:

(-4)-(3F^2-2F)=0

We add all the numbers together, and all the variables

-(3F^2-2F)-4=0

We get rid of parentheses

-3F^2+2F-4=0

a = -3; b = 2; c = -4;
Δ = b2-4ac
Δ = 22-4·(-3)·(-4)
Δ = -44
Delta is less than zero, so there is no solution for the equation

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