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(C)=24000-10C+0.04C^2
We move all terms to the left:
(C)-(24000-10C+0.04C^2)=0
We get rid of parentheses
-0.04C^2+10C+C-24000=0
We add all the numbers together, and all the variables
-0.04C^2+11C-24000=0
a = -0.04; b = 11; c = -24000;
Δ = b2-4ac
Δ = 112-4·(-0.04)·(-24000)
Δ = -3719
Delta is less than zero, so there is no solution for the equation
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