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m in (-oo:+oo)
m^2-(54/5) = 0
m^2-54/5 = 0
1*m^2 = 54/5 // : 1
m^2 = 54/5
m^2 = 54/5 // ^ 1/2
abs(m) = (54/5)^(1/2)
m = (54/5)^(1/2) or m = -(54/5)^(1/2)
m in { (54/5)^(1/2), -(54/5)^(1/2) }
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