-16y^6-15*-21/12y^3

Solution for -16y^6-15*-21/12y^3 equation:

y in (-oo:+oo)

-16*y^6-(((-21*15)/12)*y^3) = 0

(105/4)*y^3-16*y^6 = 0

105/4*y^3-16*y^6 = 0

t_1 = y^3

105/4*t_1^1-16*t_1^2 = 0

105/4*t_1-16*t_1^2 = 0

DELTA = (105/4)^2-(-16*0*4)

DELTA = 11025/16

DELTA > 0

t_1 = ((11025/16)^(1/2)-105/4)/(-16*2) or t_1 = (-(11025/16)^(1/2)-105/4)/(-16*2)

t_1 = 0 or t_1 = 105/64

t_1 = 0

y^3+0 = 0

y^3 = 0

1*y^3 = 0 // : 1

y^3 = 0

y = 0

t_1 = 105/64

y^3-105/64 = 0

1*y^3 = 105/64 // : 1

y^3 = 105/64

y^3 = 105/64 // ^ 1/3

y = (105/64)^(1/3)

y in { 0, (105/64)^(1/3) }