y+16=225/y

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Solution for y+16=225/y equation: 


D( y )

y = 0

y = 0

y = 0

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

y+16 = 225/y // - 225/y

y-(225/y)+16 = 0

y-225*y^-1+16 = 0

1*y^1-225*y^-1+16*y^0 = 0

(1*y^2+16*y^1-225*y^0)/(y^1) = 0 // * y^2

y^1*(1*y^2+16*y^1-225*y^0) = 0

y^1

y^2+16*y-225 = 0

y^2+16*y-225 = 0

DELTA = 16^2-(-225*1*4)

DELTA = 1156

DELTA > 0

y = (1156^(1/2)-16)/(1*2) or y = (-1156^(1/2)-16)/(1*2)

y = 9 or y = -25

y in { -25, 9} 

y in { -25, 9 }

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