y=(x/2.5)*2x

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Solution for y=(x/2.5)*2x equation: 


x in (-oo:+oo)

y = 2*(x/2.5)*x // - 2*(x/2.5)*x

y-(2*(x/2.5)*x) = 0

y-0.8*x^2 = 0

-0.8*x^2 = -y // : -0.8

x^2 = 1.25*y

x^2 = 1.25*y // ^ 1/2

abs(x) = 1.25^(1/2)*y^(1/2)

x = 1.25^(1/2)*y^(1/2) or x = -(1.25^(1/2)*y^(1/2))

x in { 1.25^(1/2)*y^(1/2), -(1.25^(1/2)*y^(1/2)) }

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