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-x^2+18x=93
We move all terms to the left:
-x^2+18x-(93)=0
We add all the numbers together, and all the variables
-1x^2+18x-93=0
a = -1; b = 18; c = -93;
Δ = b2-4ac
Δ = 182-4·(-1)·(-93)
Δ = -48
Delta is less than zero, so there is no solution for the equation
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