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x in (-oo:+oo)
(x-(7/2))^2 = 49/2 // - 49/2
(x-(7/2))^2-(49/2) = 0
(x-7/2)^2-49/2 = 0
(2*(x-7/2)^2)/2-49/2 = 0
2*(x-7/2)^2-49 = 0
2*x^2-14*x-49/2 = 0
2*x^2-14*x-49/2 = 0
2*x^2-14*x-49/2 = 0
DELTA = (-14)^2-(-49/2*2*4)
DELTA = 392
DELTA > 0
x = (392^(1/2)+14)/(2*2) or x = (14-392^(1/2))/(2*2)
x = (14*2^(1/2)+14)/4 or x = (14-14*2^(1/2))/4
(x-((14-14*2^(1/2))/4))*(x-((14*2^(1/2)+14)/4)) = 0
((x-((14-14*2^(1/2))/4))*(x-((14*2^(1/2)+14)/4)))/2 = 0
((x-((14-14*2^(1/2))/4))*(x-((14*2^(1/2)+14)/4)))/2 = 0 // * 2
(x-((14-14*2^(1/2))/4))*(x-((14*2^(1/2)+14)/4)) = 0
( x-((14*2^(1/2)+14)/4) )
x-((14*2^(1/2)+14)/4) = 0 // + (14*2^(1/2)+14)/4
x = (14*2^(1/2)+14)/4
( x-((14-14*2^(1/2))/4) )
x-((14-14*2^(1/2))/4) = 0 // + (14-14*2^(1/2))/4
x = (14-14*2^(1/2))/4
x in { (14*2^(1/2)+14)/4, (14-14*2^(1/2))/4 }
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