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x^2-(7*X)-(17/4) = 0
x^2-7*X-17/4 = 0
1*x^2 = -(-7*X-17/4) // : 1
x^2 = 17/4-(-7*X)
x^2 = 7*X+17/4 // ^ 1/2
abs(x) = (7*X+17/4)^(1/2)
x = (7*X+17/4)^(1/2) or x = -(7*X+17/4)^(1/2)
x in { (7*X+17/4)^(1/2), -(7*X+17/4)^(1/2) }
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