1/4-9z^2

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Solution for 1/4-9z^2 equation: 


z in (-oo:+oo)

1/4-(9*z^2) = 0

1/4-9*z^2 = 0

-9*z^2 = -1/4 // : -9

z^2 = 1/36

z^2 = 1/36 // ^ 1/2

abs(z) = 1/6

z = 1/6 or z = -1/6

z in { 1/6, -1/6 }

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