A=0.86x^2/2

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Solution for A=0.86x^2/2 equation: 


x in (-oo:+oo)

A = (0.86*x^2)/2 // - (0.86*x^2)/2

A-((0.86*x^2)/2) = 0

A-0.43*x^2 = 0

-0.43*x^2 = -A // : -0.43

x^2 = 2.3255814*A

x^2 = 2.3255814*A // ^ 1/2

abs(x) = 2.3255814^(1/2)*A^(1/2)

x = 2.3255814^(1/2)*A^(1/2) or x = -(2.3255814^(1/2)*A^(1/2))

x in { 2.3255814^(1/2)*A^(1/2), -(2.3255814^(1/2)*A^(1/2)) }

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