F(x)=-x2+4x-8

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Solution for F(x)=-x2+4x-8 equation: 



(F)=-F2+4F-8

We move all terms to the left:

(F)-(-F2+4F-8)=0

We add all the numbers together, and all the variables

-(-1F^2+4F-8)+F=0

We get rid of parentheses

1F^2-4F+F+8=0

We add all the numbers together, and all the variables

F^2-3F+8=0

a = 1; b = -3; c = +8;
Δ = b2-4ac
Δ = -32-4·1·8
Δ = -23
Delta is less than zero, so there is no solution for the equation

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