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X2-18X+81=-12
We move all terms to the left:
X2-18X+81-(-12)=0
We add all the numbers together, and all the variables
X^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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