Question

If z² +1/z² = 11 find z³ - 1/z³ using only positive value of z- 1/z

Answer 1

Hope it helps you...

please mark me as brainliest....

Answer 2

Answer:

198

Step-by-step explanation:

z² + 1/z² = 34

(z + 1/z)² -2 = 34

(z + 1/z)² = 36

(z + 1/z) = 6

now,

z³ + 1/z³ = (z + 1/z)³ -3(z + 1/z)

= (6)³ - 3(6)

= 216 - 18

= 198