1,8=(x^2/(1-x))

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Solution for 1,8=(x^2/(1-x)) equation: 


D( x )

1-x = 0

1-x = 0

1-x = 0

1-x = 0 // - 1

-x = -1 // * -1

x = 1

x in (-oo:1) U (1:+oo)

1.8 = (x^2)/(1-x) // - (x^2)/(1-x)

1.8-((x^2)/(1-x)) = 0

(-1*x^2)/(1-x)+1.8 = 0

(-1*x^2)/(1-x)+(1.8*(1-x))/(1-x) = 0

1.8*(1-x)-1*x^2 = 0

1.8-x^2-1.8*x = 0

1.8-x^2-1.8*x = 0

1.8-x^2-1.8*x = 0

DELTA = (-1.8)^2-(-1*1.8*4)

DELTA = 1.8^2+7.2

DELTA = 10.44

DELTA > 0

x = ((1.8^2+7.2)^(1/2)+1.8)/(-1*2) or x = (1.8-(1.8^2+7.2)^(1/2))/(-1*2)

x = ((1.8^2+7.2)^(1/2)+1.8)/(-2) or x = (1.8-(1.8^2+7.2)^(1/2))/(-2)

(x-(((1.8^2+7.2)^(1/2)+1.8)/(-2)))*(x-((1.8-(1.8^2+7.2)^(1/2))/(-2))) = 0

((x-(((1.8^2+7.2)^(1/2)+1.8)/(-2)))*(x-((1.8-(1.8^2+7.2)^(1/2))/(-2))))/(1-x) = 0

((x-(((1.8^2+7.2)^(1/2)+1.8)/(-2)))*(x-((1.8-(1.8^2+7.2)^(1/2))/(-2))))/(1-x) = 0 // * 1-x

(x-(((1.8^2+7.2)^(1/2)+1.8)/(-2)))*(x-((1.8-(1.8^2+7.2)^(1/2))/(-2))) = 0

( x-(((1.8^2+7.2)^(1/2)+1.8)/(-2)) )

x-(((1.8^2+7.2)^(1/2)+1.8)/(-2)) = 0 // + ((1.8^2+7.2)^(1/2)+1.8)/(-2)

x = ((1.8^2+7.2)^(1/2)+1.8)/(-2)

( x-((1.8-(1.8^2+7.2)^(1/2))/(-2)) )

x-((1.8-(1.8^2+7.2)^(1/2))/(-2)) = 0 // + (1.8-(1.8^2+7.2)^(1/2))/(-2)

x = (1.8-(1.8^2+7.2)^(1/2))/(-2)

x in { ((1.8^2+7.2)^(1/2)+1.8)/(-2), (1.8-(1.8^2+7.2)^(1/2))/(-2) }

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