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x^2-(7*x)+5/4 = 0
x^2-7*x+5/4 = 0
x^2-7*x+5/4 = 0
DELTA = (-7)^2-(1*5/4*4)
DELTA = 44
DELTA > 0
x = (44^(1/2)+7)/(1*2) or x = (7-44^(1/2))/(1*2)
x = (2*11^(1/2)+7)/2 or x = (7-2*11^(1/2))/2
x in { (7-2*11^(1/2))/2, (2*11^(1/2)+7)/2 }
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