Question

if z - 1 by z is equal to 10 then z square + 1 by z square is​

Answer 1

Answer:

52

Step-by-step explanation:

z?+1/z?=18

subtracting 2 both sides

z?-2+1/z?=16

z²-2*z*1/z+1/z?=16

(z-1/z)²=16

z-1/z=14

taking z-1/z=4

Now z3-1/z=(z-1/z)³+3*z*1/z(z-1/z)

=(4) 3-3*1*(4)

=64-12

=52

Answer 2

Answer:

Z - 1 = 10

Z

Z - 1 = 10Z

-1 = 10z - z

-1 = 9z

z = -1

9

Now,

Z² + 1

z

= ( -1/9)² +1

-1/9

= 0.012 + 1

-0.11

= 1.012/ - 0.11

= -9.2

Hope it helps you..

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