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w in (-oo:+oo)
16*w^6-(36*w^4)+((36*w^2)/4)*w^2 = 0
16*w^6-36*w^4+((36*w^2)/4)*w^2 = 0
16*w^6-27*w^4 = 0
w^4*(16*w^2-27) = 0
16*w^2 = 27 // : 16
w^2 = 27/16
w^2 = 27/16 // ^ 1/2
abs(w) = (27/16)^(1/2)
w = (27/16)^(1/2) or w = -(27/16)^(1/2)
w^4 = 0
1*w^4 = 0 // : 1
w^4 = 0
w = 0
w in { (27/16)^(1/2), -(27/16)^(1/2), 0 }
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