7x2+2x+4=0

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Solution for 7x2+2x+4=0 equation: 



7x^2+2x+4=0

a = 7; b = 2; c = +4;
Δ = b2-4ac
Δ = 22-4·7·4
Δ = -108
Delta is less than zero, so there is no solution for the equation

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