Question

if a-1/a=4 find : a2+1/a2​

Answer 1

Answer:

Step-by-step explanation:

a-1/a=4

Squaring both sides,

a² + 1/a² - 2*a*1/a =16

a² + 1/a² -2=16

a² + 1/a²=16+2

a² + 1/a²=18.

Answer 2

Answer:

Step-by-step explanation: