8c^7 = -0,72
anyone know?
closest I got to is 0.119269374345469013117078464419834466525, which results in 0.7200000000000000000000000000000000000351
8c^7 = -0.72 divide both sides by 8
c^7 = -0.09 take the 7th root of both sides
c = (-0.09)1/7
c ≈ -0.70893 [ real solution ]
