5x^2-14x+21=0

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Solution for 5x^2-14x+21=0 equation: 



5x^2-14x+21=0

a = 5; b = -14; c = +21;
Δ = b2-4ac
Δ = -142-4·5·21
Δ = -224
Delta is less than zero, so there is no solution for the equation

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