7/8b^2-5/6b^3

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Solution for 7/8b^2-5/6b^3 equation: 


b in (-oo:+oo)

(7/8)*b^2-((5/6)*b^3) = 0

(-5/6)*b^3+(7/8)*b^2 = 0

7/8*b^2-5/6*b^3 = 0

1/2*b^2*(7/4-5/3*b) = 0

7/4-5/3*b = 0 // - 7/4

-5/3*b = -7/4 // : -5/3

b = -7/4/(-5/3)

b = 21/20

(b^2)/2 = 0

1/2*b^2 = 0 // : 1/2

b^2 = 0

b = 0

b in { 21/20, 0 }

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