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45/5-(2*x^3) = 0
45/5-2*x^3 = 0
-2*x^3 = -9 // : -2
x^3 = 9/2
x^3 = 9/2 // ^ 1/3
x = (9/2)^(1/3)
x = (9/2)^(1/3)
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