(-1/2y)^2+y^2=25

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Solution for (-1/2y)^2+y^2=25 equation: 


y in (-oo:+oo)

((-1/2)*y)^2+y^2 = 25 // - 25

((-1/2)*y)^2+y^2-25 = 0

5/4*y^2 = 25 // : 5/4

y^2 = 20

y^2 = 20 // ^ 1/2

abs(y) = 2*5^(1/2)

y = 2*5^(1/2) or y = -(2*5^(1/2))

y in { 2*5^(1/2), -(2*5^(1/2)) }

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