200=(2/5)*25*x^2

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Solution for 200=(2/5)*25*x^2 equation: 


x in (-oo:+oo)

200 = 25*(2/5)*x^2 // - 25*(2/5)*x^2

200-(25*(2/5)*x^2) = 0

200-10*x^2 = 0

-10*x^2 = -200 // : -10

x^2 = 20

x^2 = 20 // ^ 1/2

abs(x) = 2*5^(1/2)

x = 2*5^(1/2) or x = -(2*5^(1/2))

x in { 2*5^(1/2), -(2*5^(1/2)) }

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