d=1/2x^2

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Solution for d=1/2x^2 equation: 


x in (-oo:+oo)

d = (1/2)*x^2 // - (1/2)*x^2

d-((1/2)*x^2) = 0

d+(-1/2)*x^2 = 0

-1/2*x^2 = -d // : -1/2

x^2 = 2*d

x^2 = 2*d // ^ 1/2

abs(x) = 2^(1/2)*d^(1/2)

x = 2^(1/2)*d^(1/2) or x = -(2^(1/2)*d^(1/2))

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

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