9y-12+7/y=0

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Solution for 9y-12+7/y=0 equation: 


D( y )

y = 0

y = 0

y = 0

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

9*y+7/y-12 = 0

9*y^1+7*y^-1-12*y^0 = 0

(9*y^2-12*y^1+7*y^0)/(y^1) = 0 // * y^2

y^1*(9*y^2-12*y^1+7*y^0) = 0

y^1

9*y^2-12*y+7 = 0

9*y^2-12*y+7 = 0

DELTA = (-12)^2-(4*7*9)

DELTA = -108

DELTA < 0

y in { } 

y belongs to the empty set

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