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10*x^2-((105*x)/11) = 5 // - 5
10*x^2-((105*x)/11)-5 = 0
10*x^2+(-105/11)*x-5 = 0
10*x^2-105/11*x-5 = 0
DELTA = (-105/11)^2-(-5*4*10)
DELTA = 35225/121
DELTA > 0
x = ((35225/121)^(1/2)+105/11)/(2*10) or x = (105/11-(35225/121)^(1/2))/(2*10)
x = ((35225/121)^(1/2)+105/11)/20 or x = (105/11-(35225/121)^(1/2))/20
x in { (105/11-(35225/121)^(1/2))/20, ((35225/121)^(1/2)+105/11)/20 }
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