-x^2=0,4

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Solution for -x^2=0,4 equation: 



-x^2=0.4

We move all terms to the left:

-x^2-(0.4)=0

We add all the numbers together, and all the variables

-1x^2-0.4=0

a = -1; b = 0; c = -0.4;
Δ = b2-4ac
Δ = 02-4·(-1)·(-0.4)
Δ = -1.6
Delta is less than zero, so there is no solution for the equation

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