anyone knows how to do this ...thing .... z^{4}=81

Hello Guest!

z^{4} = z * z * z * z

81 = 3 * 3 * 3 * 3

z * z * z * z = 3 * 3 * 3 * 3

z = 3 logical !

\(\color{BrickRed}z^4=81\\ z= \sqrt[4]{81}=\sqrt{\sqrt{81}}=\sqrt{9 }\color{blue}=3\)

!

z^4=81

z=3 is one answer, the others are z=-3, z=3i and z=-3i