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x^2-8x=-112
We move all terms to the left:
x^2-8x-(-112)=0
We add all the numbers together, and all the variables
x^2-8x+112=0
a = 1; b = -8; c = +112;
Δ = b2-4ac
Δ = -82-4·1·112
Δ = -384
Delta is less than zero, so there is no solution for the equation
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