7b^3-4b^2-9b/4b^2

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Solution for 7b^3-4b^2-9b/4b^2 equation: 


b in (-oo:+oo)

7*b^3-(((9*b)/4)*b^2)-(4*b^2) = 0

7*b^3+(-9/4)*b^3-4*b^2 = 0

19/4*b^3-4*b^2 = 0

b^2*(19/4*b-4) = 0

19/4*b-4 = 0 // + 4

19/4*b = 4 // : 19/4

b = 4/19/4

b = 16/19

b^2 = 0

1*b^2 = 0 // : 1

b^2 = 0

b = 0

b in { 16/19, 0 }

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