anyone knows how to do this ...thing .... z4=81
Hello Guest!
z4 = z * z * z * z
81 = 3 * 3 * 3 * 3
z * z * z * z = 3 * 3 * 3 * 3
z = 3 logical !
\(\color{BrickRed}z^4=81\\ z= \sqrt[4]{81}=\sqrt{\sqrt{81}}=\sqrt{9 }\color{blue}=3\)
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z^4=81
z=3 is one answer, the others are z=-3, z=3i and z=-3i
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