F(4)=3x^2-9x+25

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Solution for F(4)=3x^2-9x+25 equation: 



(4)=3F^2-9F+25

We move all terms to the left:

(4)-(3F^2-9F+25)=0

We get rid of parentheses

-3F^2+9F-25+4=0

We add all the numbers together, and all the variables

-3F^2+9F-21=0

a = -3; b = 9; c = -21;
Δ = b2-4ac
Δ = 92-4·(-3)·(-21)
Δ = -171
Delta is less than zero, so there is no solution for the equation

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