x^2-81/9+x

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Solution for x^2-81/9+x equation: 


x in (-oo:+oo)

x^2+x-(81/9) = 0

x^2+x-9 = 0

x^2+x-9 = 0

DELTA = 1^2-(-9*1*4)

DELTA = 37

DELTA > 0

x = (37^(1/2)-1)/(1*2) or x = (-37^(1/2)-1)/(1*2)

x = (37^(1/2)-1)/2 or x = (-(37^(1/2)+1))/2

x in { (-(37^(1/2)+1))/2, (37^(1/2)-1)/2 }

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