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7*x-((16/7)*x^2)+52*x+4/(49^2)-32 = 0
(-16/7)*x^2+7*x+52*x+4/(49^2)-32 = 0
59*x-16/7*x^2-76828/2401 = 0
DELTA = 59^2-(-76828/2401*(-16/7)*4)
DELTA = 53588175/16807
DELTA > 0
x = ((53588175/16807)^(1/2)-59)/(-16/7*2) or x = (-(53588175/16807)^(1/2)-59)/(-16/7*2)
x = -7/32*((53588175/16807)^(1/2)-59) or x = 7/32*((53588175/16807)^(1/2)+59)
x in { -7/32*((53588175/16807)^(1/2)-59), 7/32*((53588175/16807)^(1/2)+59) }
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