What is the value of \({z^2}{\rm{}} + {\rm{}}\frac{1}{{{z^2}}}\) when \(z = 5{\rm{}} + {\rm{}}2\sqrt 6 ?\)

What is the value of \({z^2}{\rm{}} + {\rm{}}\frac{1}{{{z^2}}}\) when

1.	What is the value of \({z^2}{\rm{}} + {\rm{}}\frac{1}{{{z^2}}}\) when \(z = 5{\rm{}} + {\rm{}}2\sqrt 6 ?\)
A.	49
B.	50
C.	98
D.	100
Answer» D. 100