Question

if a^2 +9/a^2=31 what is the positive value if a-3/a​

Answer 1

Answer:

5  -5

Step-by-step explanation:

We know that (a-b)^2 = a^2 + b^2 - 2ab

Given a^2 + 9/a^2 = 31.

We know that (a-3/a)^2 = a^2 + (3/a)^2 - 2 * a * 3/a

= a^2 + 9/a^2 - 6

= 31 - 6

= 25.

Then a - 3/a = 5 (or) -5.

Answer 2

well for this we have

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