x^2-16/4-x

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Solution for x^2-16/4-x equation: 


x in (-oo:+oo)

x^2-x-(16/4) = 0

x^2-x-4 = 0

x^2-x-4 = 0

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

DELTA = 17

DELTA > 0

x = (17^(1/2)+1)/(1*2) or x = (1-17^(1/2))/(1*2)

x = (17^(1/2)+1)/2 or x = (1-17^(1/2))/2

x in { (1-17^(1/2))/2, (17^(1/2)+1)/2 }

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