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9k^2-18k+91=-3
We move all terms to the left:
9k^2-18k+91-(-3)=0
We add all the numbers together, and all the variables
9k^2-18k+94=0
a = 9; b = -18; c = +94;
Δ = b2-4ac
Δ = -182-4·9·94
Δ = -3060
Delta is less than zero, so there is no solution for the equation
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