0.20=x2/85-x

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Solution for 0.20=x2/85-x equation: 


x in (-oo:+oo)

0.2 = (x^2)/85-x // - (x^2)/85-x

x-((x^2)/85)+0.2 = 0

x-1/85*x^2+0.2 = 0

DELTA = 1^2-(-1/85*0.2*4)

DELTA = 1.009411768

DELTA > 0

x = (1.009411768^(1/2)-1)/(-1/85*2) or x = (-1.009411768^(1/2)-1)/(-1/85*2)

x = -85/2*(1.009411768^(1/2)-1) or x = 85/2*(1.009411768^(1/2)+1)

x in { -85/2*(1.009411768^(1/2)-1), 85/2*(1.009411768^(1/2)+1) }

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