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300 = (x^2)/360-(x/3) // - (x^2)/360-(x/3)
x/3-((x^2)/360)+300 = 0
1/3*x-1/360*x^2+300 = 0
DELTA = (1/3)^2-(-1/360*4*300)
DELTA = 31/9
DELTA > 0
x = ((31/9)^(1/2)-1/3)/(-1/360*2) or x = (-(31/9)^(1/2)-1/3)/(-1/360*2)
x = -180*((31/9)^(1/2)-1/3) or x = 180*((31/9)^(1/2)+1/3)
x in { -180*((31/9)^(1/2)-1/3), 180*((31/9)^(1/2)+1/3) }
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