- #1

- 57

- 13

- TL;DR Summary
- .

When I solve the equation sometimes the answer in the answer keys is different but the same. Why do they do that?

For example:

After solving the equation I got 1/√2 which is the same as √2/2 because we multiplied it by √2/√2. Is there any good explanation why the book writer mathematicians like to do that thing?

For example:

After solving the equation I got 1/√2 which is the same as √2/2 because we multiplied it by √2/√2. Is there any good explanation why the book writer mathematicians like to do that thing?