b+8/7b^2+56b

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Solution for b+8/7b^2+56b equation: 


b in (-oo:+oo)

(8/7)*b^2+b+56*b = 0

8/7*b^2+57*b = 0

DELTA = 57^2-(0*8/7*4)

DELTA = 3249

DELTA > 0

b = (3249^(1/2)-57)/(8/7*2) or b = (-3249^(1/2)-57)/(8/7*2)

b = 0 or b = -399/8

b in { -399/8, 0 }

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