1/25-9z^2

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Solution for 1/25-9z^2 equation: 


z in (-oo:+oo)

1/25-(9*z^2) = 0

1/25-9*z^2 = 0

-9*z^2 = -1/25 // : -9

z^2 = 1/225

z^2 = 1/225 // ^ 1/2

abs(z) = 1/15

z = 1/15 or z = -1/15

z in { 1/15, -1/15 }

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