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6x-x2-11=0
We add all the numbers together, and all the variables
-1x^2+6x-11=0
a = -1; b = 6; c = -11;
Δ = b2-4ac
Δ = 62-4·(-1)·(-11)
Δ = -8
Delta is less than zero, so there is no solution for the equation
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