1/4y^2-1=0 - solution

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Solution for 1/4y^2-1=0 equation:

y in (-oo:+oo)

(1/4)*y^2-1 = 0

1/4*y^2 = 1 // : 1/4

y^2 = 4

y^2 = 4 // ^ 1/2

abs(y) = 2

y = 2 or y = -2

y in { 2, -2 }

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