x*x/2=w-y

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Solution for x*x/2=w-y equation: 


x in (-oo:+oo)

(x*x)/2 = w-y // - w-y

(x*x)/2-w+y = 0

1/2*x^2 = -(y-w) // : 1/2

x^2 = 2*(w-y)

x^2 = 2*(w-y) // ^ 1/2

abs(x) = 2^(1/2)*(w-y)^(1/2)

x = 2^(1/2)*(w-y)^(1/2) or x = -(2^(1/2)*(w-y)^(1/2))

x in { 2^(1/2)*(w-y)^(1/2), -(2^(1/2)*(w-y)^(1/2)) }

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