F(x)=-7x^2+9x-31

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Solution for F(x)=-7x^2+9x-31 equation: 



(F)=-7F^2+9F-31

We move all terms to the left:

(F)-(-7F^2+9F-31)=0

We get rid of parentheses

7F^2-9F+F+31=0

We add all the numbers together, and all the variables

7F^2-8F+31=0

a = 7; b = -8; c = +31;
Δ = b2-4ac
Δ = -82-4·7·31
Δ = -804
Delta is less than zero, so there is no solution for the equation

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