5x2+4x=-4

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Solution for 5x2+4x=-4 equation: 



5x^2+4x=-4

We move all terms to the left:

5x^2+4x-(-4)=0

We add all the numbers together, and all the variables

5x^2+4x+4=0

a = 5; b = 4; c = +4;
Δ = b2-4ac
Δ = 42-4·5·4
Δ = -64
Delta is less than zero, so there is no solution for the equation

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