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(2*x^2)/5 = 32 // - 32
(2*x^2)/5-32 = 0
2/5*x^2 = 32 // : 2/5
x^2 = 80
x^2 = 80 // ^ 1/2
abs(x) = 4*5^(1/2)
x = 4*5^(1/2) or x = -(4*5^(1/2))
x in { 4*5^(1/2), -(4*5^(1/2)) }
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