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49*x^4-(1/2) = 0
49*x^4-1/2 = 0
49*x^4 = 1/2 // : 49
x^4 = 1/98
x^4 = 1/98 // ^ 1/4
abs(x) = (1/98)^(1/4)
x = (1/98)^(1/4) or x = -(1/98)^(1/4)
x in { (1/98)^(1/4), -(1/98)^(1/4) }
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