4+9x3-7/49 - solution

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Solution for 4+9x3-7/49 equation:

x in (-oo:+oo)

9*x^3-(7/49)+4 = 0

9*x^3-1/7+4 = 0

9*x^3 = -27/7 // : 9

x^3 = -3/7

x^3 = -3/7 // ^ 1/3

x = -(3/7)^(1/3)

x = -(3/7)^(1/3)

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