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d^2+6d^2+11d+6=0
We add all the numbers together, and all the variables
7d^2+11d+6=0
a = 7; b = 11; c = +6;
Δ = b2-4ac
Δ = 112-4·7·6
Δ = -47
Delta is less than zero, so there is no solution for the equation
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