1989.5147=1/3*7.4*x^2

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Solution for 1989.5147=1/3*7.4*x^2 equation: 


x in (-oo:+oo)

1989.5147 = 7.4*(1/3)*x^2 // - 7.4*(1/3)*x^2

1989.5147-(7.4*(1/3)*x^2) = 0

1989.5147-2.46666667*x^2 = 0

-2.46666667*x^2 = -1989.5147 // : -2.46666667

x^2 = 806.56001242

x^2 = 806.56001242 // ^ 1/2

abs(x) = 806.56001242^(1/2)

x = 806.56001242^(1/2) or x = -806.56001242^(1/2)

x in { 806.56001242^(1/2), -806.56001242^(1/2) }

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