0.20=x^2/45-x

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Solution for 0.20=x^2/45-x equation: 


x in (-oo:+oo)

0.2 = (x^2)/45-x // - (x^2)/45-x

x-((x^2)/45)+0.2 = 0

x-1/45*x^2+0.2 = 0

DELTA = 1^2-(-1/45*0.2*4)

DELTA = 1.017777776

DELTA > 0

x = (1.017777776^(1/2)-1)/(-1/45*2) or x = (-1.017777776^(1/2)-1)/(-1/45*2)

x = -45/2*(1.017777776^(1/2)-1) or x = 45/2*(1.017777776^(1/2)+1)

x in { -45/2*(1.017777776^(1/2)-1), 45/2*(1.017777776^(1/2)+1) }

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