(-72/w^2)+2=0

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Solution for (-72/w^2)+2=0 equation: 


D( w )

w^2 = 0

w^2 = 0

w^2 = 0

1*w^2 = 0 // : 1

w^2 = 0

w = 0

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

2-72/(w^2) = 0

-72*w^-2 = -2 // : -72

w^-2 = 1/36

-2 < 0

1/(w^2) = 1/36 // * w^2

1 = 1/36*w^2 // : 1/36

36 = w^2

w^2 = 36 // ^ 1/2

abs(w) = 6

w = 6 or w = -6

w in { 6, -6 }

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