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v in (-oo:+oo)
8*v^7+v^3*((32*v^4)/4)-(36*v^5) = 0
8*v^7+v^3*((32*v^4)/4)-36*v^5 = 0
16*v^7-36*v^5 = 0
4*v^5*(4*v^2-9) = 0
4*v^2 = 9 // : 4
v^2 = 9/4
v^2 = 9/4 // ^ 1/2
abs(v) = 3/2
v = 3/2 or v = -3/2
4*v^5 = 0
4*v^5 = 0 // : 4
v^5 = 0
v = 0
v in { 3/2, -3/2, 0 }
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