F(x)=-(x+2)(x-2)

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Solution for F(x)=-(x+2)(x-2) equation: 



(F)=-(F+2)(F-2)

We move all terms to the left:

(F)-(-(F+2)(F-2))=0

We use the square of the difference formula

F^2+F+4=0

a = 1; b = 1; c = +4;
Δ = b2-4ac
Δ = 12-4·1·4
Δ = -15
Delta is less than zero, so there is no solution for the equation

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