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x in (-oo:+oo)
x^2-(14*x)+49/100 = 0
x^2-14*x+49/100 = 0
x^2-14*x+49/100 = 0
DELTA = (-14)^2-(49/100*1*4)
DELTA = 4851/25
DELTA > 0
x = ((4851/25)^(1/2)+14)/(1*2) or x = (14-(4851/25)^(1/2))/(1*2)
x = ((4851/25)^(1/2)+14)/2 or x = (14-(4851/25)^(1/2))/2
x in { (14-(4851/25)^(1/2))/2, ((4851/25)^(1/2)+14)/2 }
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