x^2-4x+420=0

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Solution for x^2-4x+420=0 equation: 



x^2-4x+420=0

a = 1; b = -4; c = +420;
Δ = b2-4ac
Δ = -42-4·1·420
Δ = -1664
Delta is less than zero, so there is no solution for the equation

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