7b^2-20b+21=0

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Solution for 7b^2-20b+21=0 equation: 



7b^2-20b+21=0

a = 7; b = -20; c = +21;
Δ = b2-4ac
Δ = -202-4·7·21
Δ = -188
Delta is less than zero, so there is no solution for the equation

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