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108.8+6(12n-1.5)n=3
We move all terms to the left:
108.8+6(12n-1.5)n-(3)=0
We add all the numbers together, and all the variables
6(12n-1.5)n+105.8=0
We multiply parentheses
72n^2-9n+105.8=0
a = 72; b = -9; c = +105.8;
Δ = b2-4ac
Δ = -92-4·72·105.8
Δ = -30389.4
Delta is less than zero, so there is no solution for the equation
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