8/0.8=0.7x3-0.2^2

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Solution for 8/0.8=0.7x3-0.2^2 equation: 


x in (-oo:+oo)

8/0.8 = 0.7*x^3-0.2^2 // - 0.7*x^3-0.2^2

8/0.8-(0.7*x^3)+0.2^2 = 0

8/0.8-0.7*x^3+0.2^2 = 0

-0.7*x^3 = -(0.2^2+10) // : -0.7

x^3 = 1.42857143*(0.2^2+10)

x^3 = 1.42857143*(0.2^2+10) // ^ 1/3

x = 1.42857143^(1/3)*(0.2^2+10)^(1/3)

x = 1.42857143^(1/3)*(0.2^2+10)^(1/3)

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