Question

if a2-5a-1=0 then find a-1/a​

Answer 1

Answer:

-1

Step-by-step explanation:

Given:. a²-5a -1 = 0

To find: a-1/a

Solution:

a²-5a -1 = 0

a²-5a= 1

a²= 1+5a

a= √1+5a

Now, a-1/a = (√1+ 5a ) - 1 / √1+5a

= -1

Hence, value of a-1/a is -1.

Answer provided by gauthmath.