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10*X^5-(((16*X^4)/2)*x^2) = 0
10*X^5-8*X^4*x^2 = 0
-8*X^4*x^2 = -(10*X^5) // : -8*X^4
x^2 = (5*X)/4
x^2 = (5*X)/4 // ^ 1/2
abs(x) = (5^(1/2)*X^(1/2))/2
x = (5^(1/2)*X^(1/2))/2 or x = -((5^(1/2)*X^(1/2))/2)
x in { (5^(1/2)*X^(1/2))/2, -((5^(1/2)*X^(1/2))/2) }
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