20=1/4x^2

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Solution for 20=1/4x^2 equation: 


x in (-oo:+oo)

20 = (1/4)*x^2 // - (1/4)*x^2

20-((1/4)*x^2) = 0

(-1/4)*x^2+20 = 0

-1/4*x^2 = -20 // : -1/4

x^2 = 80

x^2 = 80 // ^ 1/2

abs(x) = 4*5^(1/2)

x = 4*5^(1/2) or x = -(4*5^(1/2))

x in { 4*5^(1/2), -(4*5^(1/2)) }

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