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k in (-oo:+oo)
(4*k^4)/3-((17*k^2)/3)+4 = 0
(4*k^4)/3+(-17/3)*k^2+4 = 0
4/3*k^4-17/3*k^2+4 = 0
t_1 = k^2
4/3*t_1^2-17/3*t_1^1+4 = 0
4/3*t_1^2-17/3*t_1+4 = 0
DELTA = (-17/3)^2-(4/3*4*4)
DELTA = 97/9
DELTA > 0
t_1 = ((97/9)^(1/2)+17/3)/(4/3*2) or t_1 = (17/3-(97/9)^(1/2))/(4/3*2)
t_1 = 3/8*((97/9)^(1/2)+17/3) or t_1 = 3/8*(17/3-(97/9)^(1/2))
t_1 = 3/8*(17/3-(97/9)^(1/2))
k^2-(3/8*(17/3-(97/9)^(1/2))) = 0
k^2-3/8*(17/3-(97/9)^(1/2)) = 0
1*k^2 = -(-3/8*(17/3-(97/9)^(1/2))) // : 1
k^2 = 3/8*(17/3-(97/9)^(1/2))
k^2 = 3/8*(17/3-(97/9)^(1/2)) // ^ 1/2
abs(k) = (3/8)^(1/2)*(17/3-(97/9)^(1/2))^(1/2)
k = (3/8)^(1/2)*(17/3-(97/9)^(1/2))^(1/2) or k = -((3/8)^(1/2)*(17/3-(97/9)^(1/2))^(1/2))
t_1 = 3/8*((97/9)^(1/2)+17/3)
k^2-(3/8*((97/9)^(1/2)+17/3)) = 0
k^2-3/8*((97/9)^(1/2)+17/3) = 0
1*k^2 = -(-3/8*((97/9)^(1/2)+17/3)) // : 1
k^2 = 3/8*((97/9)^(1/2)+17/3)
k^2 = 3/8*((97/9)^(1/2)+17/3) // ^ 1/2
abs(k) = (3/8)^(1/2)*((97/9)^(1/2)+17/3)^(1/2)
k = (3/8)^(1/2)*((97/9)^(1/2)+17/3)^(1/2) or k = -((3/8)^(1/2)*((97/9)^(1/2)+17/3)^(1/2))
k in { (3/8)^(1/2)*(17/3-(97/9)^(1/2))^(1/2), -((3/8)^(1/2)*(17/3-(97/9)^(1/2))^(1/2)), (3/8)^(1/2)*((97/9)^(1/2)+17/3)^(1/2), -((3/8)^(1/2)*((97/9)^(1/2)+17/3)^(1/2)) }
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