Question

If a^2+1/a^2=18 ,find the value of a+1/a and a-1/a.​

Answer 1

Answer:

Here is the solution

Hope this helps u

Answer 2

Answer:

Step-by-step explanation:

a^2 + 1/a^2 = 18

(a + 1/a)^2 = a^2 + 1/a^2 + 2

                 = 18 + 2

                  = 20

a + 1 / a = root 20

(a - 1/a)^2 = a^2 + 1/a^2 - 2

                 = 18 - 2

                 = 16

a - 1/a = root 16

           = 4

Therefore , a + 1/a = root 20 and a - 1/a = 4