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(y^2)/3-(25/64) = 0
(y^2)/3-25/64 = 0
1/3*y^2 = 25/64 // : 1/3
y^2 = 75/64
y^2 = 75/64 // ^ 1/2
abs(y) = (75/64)^(1/2)
y = (75/64)^(1/2) or y = -(75/64)^(1/2)
y in { (75/64)^(1/2), -(75/64)^(1/2) }
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