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=-10H^2-80
We move all terms to the left:
-(-10H^2-80)=0
We get rid of parentheses
10H^2+80=0
a = 10; b = 0; c = +80;
Δ = b2-4ac
Δ = 02-4·10·80
Δ = -3200
Delta is less than zero, so there is no solution for the equation
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