Question

If a-1/a is square root of 5 find a+1/a

Answer 1

square on both the sides

Answer:

(a-1/a)^2 = 5

Step-by-step explanation:

a^2 + 1/a^2 -2=5

a^2 + 1/a^2 = 7

add 2 on both sides

(a+1/a)^2 = 9

so there for a+ 1/a = 3(plus minus 3)