Question

a²+a/a²=31 then find a-3/a

Answer 1

Answer:

a-3/a = ± 5

assuming in question a²+9/a²=31  instead of a²+a/a²=31

Step-by-step explanation:

a²+a/a²=31 then find a-3/a

Looks like question should be like below

a²+9/a²=31 then find a-3/a

Then

Let say a - 3/a = x

Squaring both sides

a² + 9/a² - 6 = x²

Putting value of a²+9/a²=31

then

31 - 6 = x²

=> 25 = x²

=> x = ± 5

so a-3/a = ± 5