K(450)=16000+50x+0.2x^2

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Solution for K(450)=16000+50x+0.2x^2 equation: 



(450)=16000+50K+0.2K^2

We move all terms to the left:

(450)-(16000+50K+0.2K^2)=0

We get rid of parentheses

-0.2K^2-50K-16000+450=0

We add all the numbers together, and all the variables

-0.2K^2-50K-15550=0

a = -0.2; b = -50; c = -15550;
Δ = b2-4ac
Δ = -502-4·(-0.2)·(-15550)
Δ = -9940
Delta is less than zero, so there is no solution for the equation

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