y2=4/9

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Solution for y2=4/9 equation: 


y in (-oo:+oo)

y^2 = 4/9 // - 4/9

y^2-(4/9) = 0

y^2-4/9 = 0

1*y^2 = 4/9 // : 1

y^2 = 4/9

y^2 = 4/9 // ^ 1/2

abs(y) = 2/3

y = 2/3 or y = -2/3

y in { 2/3, -2/3 }

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