b^2/b+7-49/b+7

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Solution for b^2/b+7-49/b+7 equation: 


D( b )

b = 0

b = 0

b = 0

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

(b^2)/b-(49/b)+7+7 = 0

(b^2)/b-49*b^-1+7+7 = 0

1*b^1-49*b^-1+14*b^0 = 0

(1*b^2+14*b^1-49*b^0)/(b^1) = 0 // * b^2

b^1*(1*b^2+14*b^1-49*b^0) = 0

b^1

b^2+14*b-49 = 0

b^2+14*b-49 = 0

DELTA = 14^2-(-49*1*4)

DELTA = 392

DELTA > 0

b = (392^(1/2)-14)/(1*2) or b = (-392^(1/2)-14)/(1*2)

b = (14*2^(1/2)-14)/2 or b = (-14*2^(1/2)-14)/2

b in { (-14*2^(1/2)-14)/2, (14*2^(1/2)-14)/2} 

b in { (-14*2^(1/2)-14)/2, (14*2^(1/2)-14)/2 }

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