9/y+2=y+2

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Solution for 9/y+2=y+2 equation: 


D( y )

y = 0

y = 0

y = 0

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

9/y+2 = y+2 // - y+2

9/y-y-2+2 = 0

9*y^-1-1*y^1 = 0

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

y^1*(9*y^0-1*y^2) = 0

y^1

9-y^2 = 0

9-y^2 = 0

DELTA = 0^2-(-1*4*9)

DELTA = 36

DELTA > 0

y = (36^(1/2)+0)/(-1*2) or y = (0-36^(1/2))/(-1*2)

y = -3 or y = 3

y in { -3, 3} 

y in { -3, 3 }

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