8+(y-17/y+9)

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Solution for 8+(y-17/y+9) equation: 


D( y )

y = 0

y = 0

y = 0

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

y-(17/y)+8+9 = 0

y-17*y^-1+8+9 = 0

1*y^1-17*y^-1+17*y^0 = 0

(1*y^2+17*y^1-17*y^0)/(y^1) = 0 // * y^2

y^1*(1*y^2+17*y^1-17*y^0) = 0

y^1

y^2+17*y-17 = 0

y^2+17*y-17 = 0

DELTA = 17^2-(-17*1*4)

DELTA = 357

DELTA > 0

y = (357^(1/2)-17)/(1*2) or y = (-357^(1/2)-17)/(1*2)

y = (357^(1/2)-17)/2 or y = (-(357^(1/2)+17))/2

y in { (-(357^(1/2)+17))/2, (357^(1/2)-17)/2} 

y in { (-(357^(1/2)+17))/2, (357^(1/2)-17)/2 }

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