Question

If a=5+2root6 find the value of a2+1/a2

Answer 1

Answer:

98

Step-by-step explanation:

a = 5 + 2 root 6

1/a = 5 - 2 root 6

(5 + 2 root 6)^2 (5 - 2 root 6)^2

25 + 24 - 20 root 6 + 25 + 24 + 20 root 6

25 + 25 + 24 + 24

50 + 48

98