3/y^2-9

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Solution for 3/y^2-9 equation: 


D( y )

y^2 = 0

y^2 = 0

y^2 = 0

1*y^2 = 0 // : 1

y^2 = 0

y = 0

y in (-oo:0) U (0:+oo)

3/(y^2)-9 = 0

3*y^-2 = 9 // : 3

y^-2 = 3

-2 < 0

1/(y^2) = 3 // * y^2

1 = 3*y^2 // : 3

1/3 = y^2

y^2 = 1/3 // ^ 1/2

abs(y) = (1/3)^(1/2)

y = (1/3)^(1/2) or y = -(1/3)^(1/2)

y in { (1/3)^(1/2), -(1/3)^(1/2) }

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