(x^2/7)-x=-(11/7)

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Solution for (x^2/7)-x=-(11/7) equation: 


x in (-oo:+oo)

(x^2)/7-x = -(11/7) // + 11/7

(x^2)/7-x+11/7 = 0

1/7*x^2-x+11/7 = 0

DELTA = (-1)^2-(1/7*11/7*4)

DELTA = 5/49

DELTA > 0

x = ((5/49)^(1/2)+1)/(1/7*2) or x = (1-(5/49)^(1/2))/(1/7*2)

x = 7/2*((5/49)^(1/2)+1) or x = 7/2*(1-(5/49)^(1/2))

x in { 7/2*(1-(5/49)^(1/2)), 7/2*((5/49)^(1/2)+1) }

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