20=1/9x^2

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Solution for 20=1/9x^2 equation: 


x in (-oo:+oo)

20 = (1/9)*x^2 // - (1/9)*x^2

20-((1/9)*x^2) = 0

(-1/9)*x^2+20 = 0

-1/9*x^2 = -20 // : -1/9

x^2 = 180

x^2 = 180 // ^ 1/2

abs(x) = 6*5^(1/2)

x = 6*5^(1/2) or x = -(6*5^(1/2))

x in { 6*5^(1/2), -(6*5^(1/2)) }

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