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x in (-oo:+oo)
y = (-1/170)*(x-225)*(x+225) // - (-1/170)*(x-225)*(x+225)
y-((-1/170)*(x-225)*(x+225)) = 0
(1/170)*(x+225)*(x-225)+y = 0
1/170*(x+225)*(x-225)+y = 0
1/170*(x+225)*(x-225)+y = 0
1/170*x^2+y-10125/34 = 0
1/170*x^2+y-10125/34 = 0
1/170*x^2 = -(y-10125/34) // : 1/170
x^2 = 170*(10125/34-y)
x^2 = 170*(10125/34-y) // ^ 1/2
abs(x) = 170^(1/2)*(10125/34-y)^(1/2)
x = 170^(1/2)*(10125/34-y)^(1/2) or x = -(170^(1/2)*(10125/34-y)^(1/2))
x in { 170^(1/2)*(10125/34-y)^(1/2), -(170^(1/2)*(10125/34-y)^(1/2)) }
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