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a in (-oo:+oo)
a*((a^2)/4)+(8/4)*a = ((36*a)/4)*a // - ((36*a)/4)*a
a*((a^2)/4)-(((36*a)/4)*a)+(8/4)*a = 0
a*((a^2)/4)-9*a^2+(8/4)*a = 0
1/4*a^3-9*a^2+2*a = 0
a*(1/4*a^2-9*a+2) = 0
1/4*a^2-9*a+2 = 0
DELTA = (-9)^2-(1/4*2*4)
DELTA = 79
DELTA > 0
a = (79^(1/2)+9)/(1/4*2) or a = (9-79^(1/2))/(1/4*2)
a = 2*(79^(1/2)+9) or a = 2*(9-79^(1/2))
a = 0
a = 0
a in { 2*(9-79^(1/2)), 2*(79^(1/2)+9), 0 }
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