F=5x^2-7x+9

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Solution for F=5x^2-7x+9 equation: 



=5F^2-7F+9

We move all terms to the left:

-(5F^2-7F+9)=0

We get rid of parentheses

-5F^2+7F-9=0

a = -5; b = 7; c = -9;
Δ = b2-4ac
Δ = 72-4·(-5)·(-9)
Δ = -131
Delta is less than zero, so there is no solution for the equation

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