x^2-9/3=4x

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Solution for x^2-9/3=4x equation: 


x in (-oo:+oo)

x^2-(9/3) = 4*x // - 4*x

x^2-(4*x)-(9/3) = 0

x^2-4*x-3 = 0

x^2-4*x-3 = 0

DELTA = (-4)^2-(-3*1*4)

DELTA = 28

DELTA > 0

x = (28^(1/2)+4)/(1*2) or x = (4-28^(1/2))/(1*2)

x = (2*7^(1/2)+4)/2 or x = (4-2*7^(1/2))/2

x in { (4-2*7^(1/2))/2, (2*7^(1/2)+4)/2 }

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